79494721 has 2 divisors, whose sum is σ = 79494722. Its totient is φ = 79494720.

The previous prime is 79494697. The next prime is 79494743. The reversal of 79494721 is 12749497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55130625 + 24364096 = 7425^2 + 4936^2 .

It is a cyclic number.

It is not a de Polignac number, because 79494721 - 2⁹ = 79494209 is a prime.

It is not a weakly prime, because it can be changed into another prime (79494221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39747360 + 39747361.

It is an arithmetic number, because the mean of its divisors is an integer number (39747361).

Almost surely, 2^79494721 is an apocalyptic number.

It is an amenable number.

79494721 is a deficient number, since it is larger than the sum of its proper divisors (1).

79494721 is an equidigital number, since it uses as much as digits as its factorization.

79494721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 79494721 is about 8915.9812135289. The cubic root of 79494721 is about 429.9778625704.

The spelling of 79494721 in words is "seventy-nine million, four hundred ninety-four thousand, seven hundred twenty-one".