31339693 has 16 divisors (see below), whose sum is σ = 39217536. Its totient is φ = 24330240.

The previous prime is 31339681. The next prime is 31339697. The reversal of 31339693 is 39693313.

It is a de Polignac number, because none of the positive numbers 2^k-31339693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31339697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26605 + ... + 27757.

It is an arithmetic number, because the mean of its divisors is an integer number (2451096).

Almost surely, 2^31339693 is an apocalyptic number.

It is an amenable number.

31339693 is a deficient number, since it is larger than the sum of its proper divisors (7877843).

31339693 is a wasteful number, since it uses less digits than its factorization.

31339693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its digits is 39366, while the sum is 37.

The square root of 31339693 is about 5598.1865813851. The cubic root of 31339693 is about 315.2813242204.

The spelling of 31339693 in words is "thirty-one million, three hundred thirty-nine thousand, six hundred ninety-three".