3157689 has 4 divisors (see below), whose sum is σ = 4210256. Its totient is φ = 2105124.

The previous prime is 3157669. The next prime is 3157703. The reversal of 3157689 is 9867513.

3157689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9867513 = 3 ⋅3289171.

It is not a de Polignac number, because 3157689 - 2⁵ = 3157657 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3157639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526279 + ... + 526284.

It is an arithmetic number, because the mean of its divisors is an integer number (1052564).

Almost surely, 2^3157689 is an apocalyptic number.

It is an amenable number.

3157689 is a deficient number, since it is larger than the sum of its proper divisors (1052567).

3157689 is a wasteful number, since it uses less digits than its factorization.

3157689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052566.

The product of its digits is 45360, while the sum is 39.

The square root of 3157689 is about 1776.9887450403. The cubic root of 3157689 is about 146.7088968155.

The spelling of 3157689 in words is "three million, one hundred fifty-seven thousand, six hundred eighty-nine".