3157709 has 4 divisors (see below), whose sum is σ = 3197760. Its totient is φ = 3117660.

The previous prime is 3157703. The next prime is 3157711. The reversal of 3157709 is 9077513.

3157709 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3157709 is a prime.

It is a super-2 number, since 2×3157709² = 19942252257362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3157703) 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, 19907 + ... + 20064.

It is an arithmetic number, because the mean of its divisors is an integer number (799440).

Almost surely, 2^3157709 is an apocalyptic number.

It is an amenable number.

3157709 is a deficient number, since it is larger than the sum of its proper divisors (40051).

3157709 is an equidigital number, since it uses as much as digits as its factorization.

3157709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40050.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 3157709 is about 1776.9943725291. The cubic root of 3157709 is about 146.7092065538.

The spelling of 3157709 in words is "three million, one hundred fifty-seven thousand, seven hundred nine".