31339917 has 24 divisors (see below), whose sum is σ = 52156416. Its totient is φ = 17762976.

The previous prime is 31339883. The next prime is 31339921. The reversal of 31339917 is 71993313.

It is a de Polignac number, because none of the positive numbers 2^k-31339917 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31339937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6043 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (2173184).

Almost surely, 2^31339917 is an apocalyptic number.

It is an amenable number.

31339917 is a deficient number, since it is larger than the sum of its proper divisors (20816499).

31339917 is a wasteful number, since it uses less digits than its factorization.

31339917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 4054 counting only the distinct ones).

The product of its digits is 15309, while the sum is 36.

The square root of 31339917 is about 5598.2065878279. The cubic root of 31339917 is about 315.2820753748.

The spelling of 31339917 in words is "thirty-one million, three hundred thirty-nine thousand, nine hundred seventeen".