3137891 has 4 divisors (see below), whose sum is σ = 3145800. Its totient is φ = 3129984.

The previous prime is 3137881. The next prime is 3137899. The reversal of 3137891 is 1987313.

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 3137891 - 2¹⁰ = 3136867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3137899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3326 + ... + 4163.

It is an arithmetic number, because the mean of its divisors is an integer number (786450).

Almost surely, 2^3137891 is an apocalyptic number.

3137891 is a deficient number, since it is larger than the sum of its proper divisors (7909).

3137891 is an equidigital number, since it uses as much as digits as its factorization.

3137891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908.

The product of its digits is 4536, while the sum is 32.

The square root of 3137891 is about 1771.4093259323. The cubic root of 3137891 is about 146.4016431828.

The spelling of 3137891 in words is "three million, one hundred thirty-seven thousand, eight hundred ninety-one".