798639979 has 2 divisors, whose sum is σ = 798639980. Its totient is φ = 798639978.

The previous prime is 798639967. The next prime is 798640001. The reversal of 798639979 is 979936897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 798639979 - 2²¹ = 796542827 is a prime.

It is not a weakly prime, because it can be changed into another prime (798637979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399319989 + 399319990.

It is an arithmetic number, because the mean of its divisors is an integer number (399319990).

Almost surely, 2^798639979 is an apocalyptic number.

798639979 is a deficient number, since it is larger than the sum of its proper divisors (1).

798639979 is an equidigital number, since it uses as much as digits as its factorization.

798639979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46294416, while the sum is 67.

The square root of 798639979 is about 28260.2190189673. The cubic root of 798639979 is about 927.7914134811.

The spelling of 798639979 in words is "seven hundred ninety-eight million, six hundred thirty-nine thousand, nine hundred seventy-nine".