31630793 has 4 divisors (see below), whose sum is σ = 32721540. Its totient is φ = 30540048.

The previous prime is 31630783. The next prime is 31630811. The reversal of 31630793 is 39703613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39703613 = 941 ⋅42193.

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 21977344 = 3107^2 + 4688^2 .

It is a cyclic number.

It is not a de Polignac number, because 31630793 - 2⁴ = 31630777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31630733) 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 3 ways as a sum of consecutive naturals, for example, 545330 + ... + 545387.

It is an arithmetic number, because the mean of its divisors is an integer number (8180385).

Almost surely, 2^31630793 is an apocalyptic number.

It is an amenable number.

31630793 is a deficient number, since it is larger than the sum of its proper divisors (1090747).

31630793 is a wasteful number, since it uses less digits than its factorization.

31630793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090746.

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 31630793 is about 5624.1259765407. The cubic root of 31630793 is about 316.2544850869.

It can be divided in two parts, 31630 and 793, that added together give a palindrome (32423).

The spelling of 31630793 in words is "thirty-one million, six hundred thirty thousand, seven hundred ninety-three".