79017993 has 12 divisors (see below), whose sum is σ = 114323508. Its totient is φ = 52592640.

The previous prime is 79017973. The next prime is 79018001. The reversal of 79017993 is 39971097.

It can be written as a sum of positive squares in 2 ways, for example, as 33212169 + 45805824 = 5763^2 + 6768^2 .

It is not a de Polignac number, because 79017993 - 2⁶ = 79017929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79017973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1080 + ... + 12617.

It is an arithmetic number, because the mean of its divisors is an integer number (9526959).

Almost surely, 2^79017993 is an apocalyptic number.

It is an amenable number.

79017993 is a deficient number, since it is larger than the sum of its proper divisors (35305515).

79017993 is a wasteful number, since it uses less digits than its factorization.

79017993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14344 (or 14341 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 79017993 is about 8889.2065450185. The cubic root of 79017993 is about 429.1166162179.

The spelling of 79017993 in words is "seventy-nine million, seventeen thousand, nine hundred ninety-three".