31000430999 has 2 divisors, whose sum is σ = 31000431000. Its totient is φ = 31000430998.

The previous prime is 31000430987. The next prime is 31000431013. The reversal of 31000430999 is 99903400013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31000430999 - 2⁴ = 31000430983 is a prime.

It is a super-2 number, since 2×31000430999² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000430399) 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, 15500215499 + 15500215500.

It is an arithmetic number, because the mean of its divisors is an integer number (15500215500).

Almost surely, 2^31000430999 is an apocalyptic number.

31000430999 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000430999 is an equidigital number, since it uses as much as digits as its factorization.

31000430999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 31000430999 in words is "thirty-one billion, four hundred thirty thousand, nine hundred ninety-nine".