72896399831 has 2 divisors, whose sum is σ = 72896399832. Its totient is φ = 72896399830.

The previous prime is 72896399827. The next prime is 72896399861. The reversal of 72896399831 is 13899369827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72896399831 - 2² = 72896399827 is a prime.

It is a super-2 number, since 2×72896399831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72896399861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36448199915 + 36448199916.

It is an arithmetic number, because the mean of its divisors is an integer number (36448199916).

Almost surely, 2^72896399831 is an apocalyptic number.

72896399831 is a deficient number, since it is larger than the sum of its proper divisors (1).

72896399831 is an equidigital number, since it uses as much as digits as its factorization.

72896399831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 65.

The spelling of 72896399831 in words is "seventy-two billion, eight hundred ninety-six million, three hundred ninety-nine thousand, eight hundred thirty-one".