3781897 has 4 divisors (see below), whose sum is σ = 4322176. Its totient is φ = 3241620.

The previous prime is 3781873. The next prime is 3781901. The reversal of 3781897 is 7981873.

3781897 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.

It is a cyclic number.

It is not a de Polignac number, because 3781897 - 2¹¹ = 3779849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3782897) 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, 270129 + ... + 270142.

It is an arithmetic number, because the mean of its divisors is an integer number (1080544).

Almost surely, 2^3781897 is an apocalyptic number.

It is an amenable number.

3781897 is a deficient number, since it is larger than the sum of its proper divisors (540279).

3781897 is an equidigital number, since it uses as much as digits as its factorization.

3781897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540278.

The product of its digits is 84672, while the sum is 43.

The square root of 3781897 is about 1944.7100040880. The cubic root of 3781897 is about 155.8008773254.

The spelling of 3781897 in words is "three million, seven hundred eighty-one thousand, eight hundred ninety-seven".