31880693 has 8 divisors (see below), whose sum is σ = 34486200. Its totient is φ = 29297088.

The previous prime is 31880671. The next prime is 31880731. The reversal of 31880693 is 39608813.

It can be written as a sum of positive squares in 4 ways, for example, as 14922769 + 16957924 = 3863^2 + 4118^2 .

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 31880693 - 2¹⁰ = 31879669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31880603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2378 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (4310775).

Almost surely, 2^31880693 is an apocalyptic number.

It is an amenable number.

31880693 is a deficient number, since it is larger than the sum of its proper divisors (2605507).

31880693 is a wasteful number, since it uses less digits than its factorization.

31880693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10951.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 31880693 is about 5646.2990533623. The cubic root of 31880693 is about 317.0851605729.

The spelling of 31880693 in words is "thirty-one million, eight hundred eighty thousand, six hundred ninety-three".