190631420899 has 2 divisors, whose sum is σ = 190631420900. Its totient is φ = 190631420898.

The previous prime is 190631420897. The next prime is 190631420929. The reversal of 190631420899 is 998024136091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190631420899 - 2¹ = 190631420897 is a prime.

Together with 190631420897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (190631420893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95315710449 + 95315710450.

It is an arithmetic number, because the mean of its divisors is an integer number (95315710450).

Almost surely, 2^190631420899 is an apocalyptic number.

190631420899 is a deficient number, since it is larger than the sum of its proper divisors (1).

190631420899 is an equidigital number, since it uses as much as digits as its factorization.

190631420899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 190631420899 in words is "one hundred ninety billion, six hundred thirty-one million, four hundred twenty thousand, eight hundred ninety-nine".