79722737 has 4 divisors (see below), whose sum is σ = 81667236. Its totient is φ = 77778240.

The previous prime is 79722691. The next prime is 79722739. The reversal of 79722737 is 73722797.

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 14371681 + 65351056 = 3791^2 + 8084^2 .

It is a cyclic number.

It is not a de Polignac number, because 79722737 - 2¹² = 79718641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79722739) 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, 972188 + ... + 972269.

It is an arithmetic number, because the mean of its divisors is an integer number (20416809).

Almost surely, 2^79722737 is an apocalyptic number.

It is an amenable number.

79722737 is a deficient number, since it is larger than the sum of its proper divisors (1944499).

79722737 is a wasteful number, since it uses less digits than its factorization.

79722737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944498.

The product of its digits is 259308, while the sum is 44.

The square root of 79722737 is about 8928.7589843158. The cubic root of 79722737 is about 430.3885743001.

The spelling of 79722737 in words is "seventy-nine million, seven hundred twenty-two thousand, seven hundred thirty-seven".