3116391 has 4 divisors (see below), whose sum is σ = 4155192. Its totient is φ = 2077592.

The previous prime is 3116381. The next prime is 3116417. The reversal of 3116391 is 1936113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3116391 - 2⁶ = 3116327 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3116341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519396 + ... + 519401.

It is an arithmetic number, because the mean of its divisors is an integer number (1038798).

Almost surely, 2^3116391 is an apocalyptic number.

3116391 is a deficient number, since it is larger than the sum of its proper divisors (1038801).

3116391 is a wasteful number, since it uses less digits than its factorization.

3116391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038800.

The product of its digits is 486, while the sum is 24.

The square root of 3116391 is about 1765.3302807124. The cubic root of 3116391 is about 146.0665081361.

The spelling of 3116391 in words is "three million, one hundred sixteen thousand, three hundred ninety-one".