798457999 has 2 divisors, whose sum is σ = 798458000. Its totient is φ = 798457998.

The previous prime is 798457987. The next prime is 798458051. The reversal of 798457999 is 999754897.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-798457999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (798457939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399228999 + 399229000.

It is an arithmetic number, because the mean of its divisors is an integer number (399229000).

Almost surely, 2^798457999 is an apocalyptic number.

798457999 is a deficient number, since it is larger than the sum of its proper divisors (1).

798457999 is an equidigital number, since it uses as much as digits as its factorization.

798457999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 67.

The square root of 798457999 is about 28256.9991152635. Note that the first 3 decimals coincide. The cubic root of 798457999 is about 927.7209385439.

The spelling of 798457999 in words is "seven hundred ninety-eight million, four hundred fifty-seven thousand, nine hundred ninety-nine".