31798764859 has 2 divisors, whose sum is σ = 31798764860. Its totient is φ = 31798764858.

The previous prime is 31798764841. The next prime is 31798764863. The reversal of 31798764859 is 95846789713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31798764859 - 2⁷ = 31798764731 is a prime.

It is a super-2 number, since 2×31798764859² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31798764794 and 31798764803.

It is not a weakly prime, because it can be changed into another prime (31798761859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15899382429 + 15899382430.

It is an arithmetic number, because the mean of its divisors is an integer number (15899382430).

Almost surely, 2^31798764859 is an apocalyptic number.

31798764859 is a deficient number, since it is larger than the sum of its proper divisors (1).

31798764859 is an equidigital number, since it uses as much as digits as its factorization.

31798764859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 67.

The spelling of 31798764859 in words is "thirty-one billion, seven hundred ninety-eight million, seven hundred sixty-four thousand, eight hundred fifty-nine".