3156493 has 2 divisors, whose sum is σ = 3156494. Its totient is φ = 3156492.

The previous prime is 3156481. The next prime is 3156511. The reversal of 3156493 is 3946513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2350089 + 806404 = 1533^2 + 898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3156493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3156443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578246 + 1578247.

It is an arithmetic number, because the mean of its divisors is an integer number (1578247).

Almost surely, 2^3156493 is an apocalyptic number.

It is an amenable number.

3156493 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156493 is an equidigital number, since it uses as much as digits as its factorization.

3156493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 3156493 is about 1776.6521888091. The cubic root of 3156493 is about 146.6903720866.

The spelling of 3156493 in words is "three million, one hundred fifty-six thousand, four hundred ninety-three".