3387781 has 4 divisors (see below), whose sum is σ = 3392032. Its totient is φ = 3383532.

The previous prime is 3387749. The next prime is 3387799. The reversal of 3387781 is 1877833.

3387781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(3387781) divides (3387781-1)³.

It is a cyclic number.

It is not a de Polignac number, because 3387781 - 2⁵ = 3387749 is a prime.

It is a super-2 number, since 2×3387781² = 22954120207922, which contains 22 as substring.

It is a deceptive number, since it divides R_3387780.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3387781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3387701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (848008).

Almost surely, 2^3387781 is an apocalyptic number.

3387781 is the 1063-rd octagonal number.

It is an amenable number.

3387781 is a deficient number, since it is larger than the sum of its proper divisors (4251).

3387781 is a wasteful number, since it uses less digits than its factorization.

3387781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250.

The product of its digits is 28224, while the sum is 37.

The square root of 3387781 is about 1840.5925676260. The cubic root of 3387781 is about 150.1891096316.

The spelling of 3387781 in words is "three million, three hundred eighty-seven thousand, seven hundred eighty-one".