3139731 has 48 divisors (see below), whose sum is σ = 5674240. Its totient is φ = 1632960.

The previous prime is 3139727. The next prime is 3139733. The reversal of 3139731 is 1379313.

It is not a de Polignac number, because 3139731 - 2² = 3139727 is a prime.

It is a super-2 number, since 2×3139731² = 19715821504722, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3139695 and 3139704.

It is not an unprimeable number, because it can be changed into a prime (3139733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51441 + ... + 51501.

Almost surely, 2^3139731 is an apocalyptic number.

3139731 is a deficient number, since it is larger than the sum of its proper divisors (2534509).

3139731 is a wasteful number, since it uses less digits than its factorization.

3139731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 133 counting only the distinct ones).

The product of its digits is 1701, while the sum is 27.

The square root of 3139731 is about 1771.9286103001. The cubic root of 3139731 is about 146.4302533106.

The spelling of 3139731 in words is "three million, one hundred thirty-nine thousand, seven hundred thirty-one".