3157939 has 4 divisors (see below), whose sum is σ = 3259840. Its totient is φ = 3056040.

The previous prime is 3157927. The next prime is 3157949. The reversal of 3157939 is 9397513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3157939 - 2⁷ = 3157811 is a prime.

It is a Duffinian number.

3157939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3157898 and 3157907.

It is not an unprimeable number, because it can be changed into a prime (3157919) 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, 50904 + ... + 50965.

It is an arithmetic number, because the mean of its divisors is an integer number (814960).

Almost surely, 2^3157939 is an apocalyptic number.

3157939 is a deficient number, since it is larger than the sum of its proper divisors (101901).

3157939 is a wasteful number, since it uses less digits than its factorization.

3157939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101900.

The product of its digits is 25515, while the sum is 37.

The square root of 3157939 is about 1777.0590873688. The cubic root of 3157939 is about 146.7127684504.

It can be divided in two parts, 3157 and 939, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3157939 in words is "three million, one hundred fifty-seven thousand, nine hundred thirty-nine".