31139017 has 8 divisors (see below), whose sum is σ = 38325056. Its totient is φ = 24637392.

The previous prime is 31138997. The next prime is 31139021. The reversal of 31139017 is 71093113.

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

It is not a de Polignac number, because 31139017 - 2⁷ = 31138889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31138982 and 31139000.

It is not an unprimeable number, because it can be changed into a prime (31139047) 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 7 ways as a sum of consecutive naturals, for example, 171003 + ... + 171184.

It is an arithmetic number, because the mean of its divisors is an integer number (4790632).

Almost surely, 2^31139017 is an apocalyptic number.

It is an amenable number.

31139017 is a deficient number, since it is larger than the sum of its proper divisors (7186039).

31139017 is a wasteful number, since it uses less digits than its factorization.

31139017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342207.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 31139017 is about 5580.2344932807. The cubic root of 31139017 is about 314.6069406646.

The spelling of 31139017 in words is "thirty-one million, one hundred thirty-nine thousand, seventeen".