799615921 has 8 divisors (see below), whose sum is σ = 861456960. Its totient is φ = 737822352.

The previous prime is 799615913. The next prime is 799615933. The reversal of 799615921 is 129516997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 799615921 - 2³ = 799615913 is a prime.

It is a super-2 number, since 2×799615921² = 1278771242233356482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (799615021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28140 + ... + 48898.

It is an arithmetic number, because the mean of its divisors is an integer number (107682120).

Almost surely, 2^799615921 is an apocalyptic number.

It is an amenable number.

799615921 is a deficient number, since it is larger than the sum of its proper divisors (61841039).

799615921 is a wasteful number, since it uses less digits than its factorization.

799615921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23735.

The product of its digits is 306180, while the sum is 49.

The square root of 799615921 is about 28277.4808107087. The cubic root of 799615921 is about 928.1691815417.

The spelling of 799615921 in words is "seven hundred ninety-nine million, six hundred fifteen thousand, nine hundred twenty-one".