79300561 has 4 divisors (see below), whose sum is σ = 80796852. Its totient is φ = 77804272.

The previous prime is 79300553. The next prime is 79300567. The reversal of 79300561 is 16500397.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50140561 + 29160000 = 7081^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 79300561 - 2³ = 79300553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79300567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748066 + ... + 748171.

It is an arithmetic number, because the mean of its divisors is an integer number (20199213).

Almost surely, 2^79300561 is an apocalyptic number.

It is an amenable number.

79300561 is a deficient number, since it is larger than the sum of its proper divisors (1496291).

79300561 is a wasteful number, since it uses less digits than its factorization.

79300561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496290.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 79300561 is about 8905.0862432657. The cubic root of 79300561 is about 429.6275140971.

The spelling of 79300561 in words is "seventy-nine million, three hundred thousand, five hundred sixty-one".