31299727879 has 32 divisors (see below), whose sum is σ = 37183426560. Its totient is φ = 25793538048.

The previous prime is 31299727831. The next prime is 31299727909. The reversal of 31299727879 is 97872799213.

It is a cyclic number.

It is not a de Polignac number, because 31299727879 - 2¹⁵ = 31299695111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31299727879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31299727819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4368502 + ... + 4375660.

It is an arithmetic number, because the mean of its divisors is an integer number (1161982080).

Almost surely, 2^31299727879 is an apocalyptic number.

31299727879 is a deficient number, since it is larger than the sum of its proper divisors (5883698681).

31299727879 is a wasteful number, since it uses less digits than its factorization.

31299727879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7447.

The product of its digits is 24004512, while the sum is 64.

The spelling of 31299727879 in words is "thirty-one billion, two hundred ninety-nine million, seven hundred twenty-seven thousand, eight hundred seventy-nine".