3117381 has 4 divisors (see below), whose sum is σ = 4156512. Its totient is φ = 2078252.

The previous prime is 3117299. The next prime is 3117421. The reversal of 3117381 is 1837113.

3117381 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 an emirpimes, since its reverse is a distinct semiprime: 1837113 = 3 ⋅612371.

It is a cyclic number.

It is not a de Polignac number, because 3117381 - 2¹⁷ = 2986309 is a prime.

It is a super-2 number, since 2×3117381² = 19436128598322, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3117281) 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, 519561 + ... + 519566.

It is an arithmetic number, because the mean of its divisors is an integer number (1039128).

Almost surely, 2^3117381 is an apocalyptic number.

It is an amenable number.

3117381 is a deficient number, since it is larger than the sum of its proper divisors (1039131).

3117381 is a wasteful number, since it uses less digits than its factorization.

3117381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039130.

The product of its digits is 504, while the sum is 24.

The square root of 3117381 is about 1765.6106592338. The cubic root of 3117381 is about 146.0819737322.

The spelling of 3117381 in words is "three million, one hundred seventeen thousand, three hundred eighty-one".