31147039 has 8 divisors (see below), whose sum is σ = 38832768. Its totient is φ = 24270360.

The previous prime is 31147021. The next prime is 31147049. The reversal of 31147039 is 93074113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31147039 - 2⁹ = 31146527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31146998 and 31147016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31147049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202177 + ... + 202330.

It is an arithmetic number, because the mean of its divisors is an integer number (4854096).

Almost surely, 2^31147039 is an apocalyptic number.

31147039 is a deficient number, since it is larger than the sum of its proper divisors (7685729).

31147039 is a wasteful number, since it uses less digits than its factorization.

31147039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404525.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 31147039 is about 5580.9532339915. The cubic root of 31147039 is about 314.6339545787.

It can be divided in two parts, 3114 and 7039, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 31147039 in words is "thirty-one million, one hundred forty-seven thousand, thirty-nine".