79990873 has 2 divisors, whose sum is σ = 79990874. Its totient is φ = 79990872.

The previous prime is 79990861. The next prime is 79990901. The reversal of 79990873 is 37809997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66536649 + 13454224 = 8157^2 + 3668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79990873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79990873.

It is not a weakly prime, because it can be changed into another prime (79990073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39995436 + 39995437.

It is an arithmetic number, because the mean of its divisors is an integer number (39995437).

Almost surely, 2^79990873 is an apocalyptic number.

It is an amenable number.

79990873 is a deficient number, since it is larger than the sum of its proper divisors (1).

79990873 is an equidigital number, since it uses as much as digits as its factorization.

79990873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 79990873 is about 8943.7616806353. The cubic root of 79990873 is about 430.8705511120.

The spelling of 79990873 in words is "seventy-nine million, nine hundred ninety thousand, eight hundred seventy-three".