79724461 has 2 divisors, whose sum is σ = 79724462. Its totient is φ = 79724460.

The previous prime is 79724431. The next prime is 79724471. The reversal of 79724461 is 16442797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 15163236 = 8035^2 + 3894^2 .

It is a cyclic number.

It is not a de Polignac number, because 79724461 - 2⁵ = 79724429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79724431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39862230 + 39862231.

It is an arithmetic number, because the mean of its divisors is an integer number (39862231).

Almost surely, 2^79724461 is an apocalyptic number.

It is an amenable number.

79724461 is a deficient number, since it is larger than the sum of its proper divisors (1).

79724461 is an equidigital number, since it uses as much as digits as its factorization.

79724461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 79724461 is about 8928.8555257659. The cubic root of 79724461 is about 430.3916766545.

The spelling of 79724461 in words is "seventy-nine million, seven hundred twenty-four thousand, four hundred sixty-one".