79800961 has 4 divisors (see below), whose sum is σ = 83270592. Its totient is φ = 76331332.

The previous prime is 79800901. The next prime is 79800967. The reversal of 79800961 is 16900897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79800961 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79800967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734781 + ... + 1734826.

It is an arithmetic number, because the mean of its divisors is an integer number (20817648).

Almost surely, 2^79800961 is an apocalyptic number.

It is an amenable number.

79800961 is a deficient number, since it is larger than the sum of its proper divisors (3469631).

79800961 is a wasteful number, since it uses less digits than its factorization.

79800961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469630.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 79800961 is about 8933.1383623002. The cubic root of 79800961 is about 430.5292941325.

The spelling of 79800961 in words is "seventy-nine million, eight hundred thousand, nine hundred sixty-one".