31292993 has 4 divisors (see below), whose sum is σ = 31305648. Its totient is φ = 31280340.

The previous prime is 31292969. The next prime is 31293007. The reversal of 31292993 is 39929213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31292993 - 2¹⁰ = 31291969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31292593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 8012.

It is an arithmetic number, because the mean of its divisors is an integer number (7826412).

Almost surely, 2^31292993 is an apocalyptic number.

It is an amenable number.

31292993 is a deficient number, since it is larger than the sum of its proper divisors (12655).

31292993 is an equidigital number, since it uses as much as digits as its factorization.

31292993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12654.

The product of its digits is 26244, while the sum is 38.

The square root of 31292993 is about 5594.0140328748. The cubic root of 31292993 is about 315.1246437104.

The spelling of 31292993 in words is "thirty-one million, two hundred ninety-two thousand, nine hundred ninety-three".