798457987 has 2 divisors, whose sum is σ = 798457988. Its totient is φ = 798457986.

The previous prime is 798457981. The next prime is 798457999. The reversal of 798457987 is 789754897.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 798457987 - 2⁷ = 798457859 is a prime.

It is not a weakly prime, because it can be changed into another prime (798457981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399228993 + 399228994.

It is an arithmetic number, because the mean of its divisors is an integer number (399228994).

Almost surely, 2^798457987 is an apocalyptic number.

798457987 is a deficient number, since it is larger than the sum of its proper divisors (1).

798457987 is an equidigital number, since it uses as much as digits as its factorization.

798457987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 64.

The square root of 798457987 is about 28256.9989029267. The cubic root of 798457987 is about 927.7209338963.

The spelling of 798457987 in words is "seven hundred ninety-eight million, four hundred fifty-seven thousand, nine hundred eighty-seven".