31984372099 has 2 divisors, whose sum is σ = 31984372100. Its totient is φ = 31984372098.

The previous prime is 31984372087. The next prime is 31984372103. The reversal of 31984372099 is 99027348913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31984372099 - 2²³ = 31975983491 is a prime.

It is not a weakly prime, because it can be changed into another prime (31984372009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15992186049 + 15992186050.

It is an arithmetic number, because the mean of its divisors is an integer number (15992186050).

Almost surely, 2^31984372099 is an apocalyptic number.

31984372099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31984372099 is an equidigital number, since it uses as much as digits as its factorization.

31984372099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 31984372099 in words is "thirty-one billion, nine hundred eighty-four million, three hundred seventy-two thousand, ninety-nine".