799730121 has 16 divisors (see below), whose sum is σ = 1124018240. Its totient is φ = 504377280.

The previous prime is 799730117. The next prime is 799730123. The reversal of 799730121 is 121037997.

It is not a de Polignac number, because 799730121 - 2² = 799730117 is a prime.

It is the 28280-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 799730121.

It is not an unprimeable number, because it can be changed into a prime (799730123) by changing a digit.

It is a nontrivial repunit in base 28279.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32211 + ... + 51351.

It is an arithmetic number, because the mean of its divisors is an integer number (70251140).

Almost surely, 2^799730121 is an apocalyptic number.

It is an amenable number.

799730121 is a deficient number, since it is larger than the sum of its proper divisors (324288119).

799730121 is a wasteful number, since it uses less digits than its factorization.

799730121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19896.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 799730121 is about 28279.5000132605. The cubic root of 799730121 is about 928.2133660358.

The spelling of 799730121 in words is "seven hundred ninety-nine million, seven hundred thirty thousand, one hundred twenty-one".