3157697 has 4 divisors (see below), whose sum is σ = 3234756. Its totient is φ = 3080640.

The previous prime is 3157669. The next prime is 3157703. The reversal of 3157697 is 7967513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7967513 = 43 ⋅185291.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 1560001 = 1264^2 + 1249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3157697 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3157697.

It is not an unprimeable number, because it can be changed into a prime (3157657) 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, 38468 + ... + 38549.

It is an arithmetic number, because the mean of its divisors is an integer number (808689).

Almost surely, 2^3157697 is an apocalyptic number.

It is an amenable number.

3157697 is a deficient number, since it is larger than the sum of its proper divisors (77059).

3157697 is an equidigital number, since it uses as much as digits as its factorization.

3157697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77058.

The product of its digits is 39690, while the sum is 38.

The square root of 3157697 is about 1776.9909960380. The cubic root of 3157697 is about 146.7090207110.

The spelling of 3157697 in words is "three million, one hundred fifty-seven thousand, six hundred ninety-seven".