3156997 has 2 divisors, whose sum is σ = 3156998. Its totient is φ = 3156996.

The previous prime is 3156991. The next prime is 3157001. The reversal of 3156997 is 7996513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2515396 + 641601 = 1586^2 + 801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3156997 is a prime.

It is a Chen prime.

3156997 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3156991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578498 + 1578499.

It is an arithmetic number, because the mean of its divisors is an integer number (1578499).

Almost surely, 2^3156997 is an apocalyptic number.

It is an amenable number.

3156997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156997 is an equidigital number, since it uses as much as digits as its factorization.

3156997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 3156997 is about 1776.7940229526. The cubic root of 3156997 is about 146.6981790645.

The spelling of 3156997 in words is "three million, one hundred fifty-six thousand, nine hundred ninety-seven".