890031899 has 2 divisors, whose sum is σ = 890031900. Its totient is φ = 890031898.

The previous prime is 890031893. The next prime is 890031911. The reversal of 890031899 is 998130098.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890031899 is a prime.

It is not a weakly prime, because it can be changed into another prime (890031893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445015949 + 445015950.

It is an arithmetic number, because the mean of its divisors is an integer number (445015950).

Almost surely, 2^890031899 is an apocalyptic number.

890031899 is a deficient number, since it is larger than the sum of its proper divisors (1).

890031899 is an equidigital number, since it uses as much as digits as its factorization.

890031899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 890031899 is about 29833.4024040169. The cubic root of 890031899 is about 961.9116634755.

The spelling of 890031899 in words is "eight hundred ninety million, thirty-one thousand, eight hundred ninety-nine".