39599897231 has 2 divisors, whose sum is σ = 39599897232. Its totient is φ = 39599897230.

The previous prime is 39599897219. The next prime is 39599897251. The reversal of 39599897231 is 13279899593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39599897231 - 2³⁴ = 22420028047 is a prime.

It is a super-2 number, since 2×39599897231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39599897251) 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 as a sum of consecutive naturals, namely, 19799948615 + 19799948616.

It is an arithmetic number, because the mean of its divisors is an integer number (19799948616).

Almost surely, 2^39599897231 is an apocalyptic number.

39599897231 is a deficient number, since it is larger than the sum of its proper divisors (1).

39599897231 is an equidigital number, since it uses as much as digits as its factorization.

39599897231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33067440, while the sum is 65.

The spelling of 39599897231 in words is "thirty-nine billion, five hundred ninety-nine million, eight hundred ninety-seven thousand, two hundred thirty-one".