798639995 has 4 divisors (see below), whose sum is σ = 958368000. Its totient is φ = 638911992.

The previous prime is 798639979. The next prime is 798640001. The reversal of 798639995 is 599936897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 798639995 - 2⁴ = 798639979 is a prime.

It is a super-2 number, since 2×798639995² = 1275651683227200050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79863995 + ... + 79864004.

It is an arithmetic number, because the mean of its divisors is an integer number (239592000).

Almost surely, 2^798639995 is an apocalyptic number.

798639995 is a deficient number, since it is larger than the sum of its proper divisors (159728005).

798639995 is a wasteful number, since it uses less digits than its factorization.

798639995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159728004.

The product of its digits is 33067440, while the sum is 65.

The square root of 798639995 is about 28260.2193020507. The cubic root of 798639995 is about 927.7914196769.

The spelling of 798639995 in words is "seven hundred ninety-eight million, six hundred thirty-nine thousand, nine hundred ninety-five".