79912249 has 4 divisors (see below), whose sum is σ = 79948836. Its totient is φ = 79875664.

The previous prime is 79912247. The next prime is 79912289. The reversal of 79912249 is 94221997.

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 21114025 + 58798224 = 4595^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 79912249 - 2¹ = 79912247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79912247) 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, 14794 + ... + 19459.

It is an arithmetic number, because the mean of its divisors is an integer number (19987209).

Almost surely, 2^79912249 is an apocalyptic number.

It is an amenable number.

79912249 is a deficient number, since it is larger than the sum of its proper divisors (36587).

79912249 is a wasteful number, since it uses less digits than its factorization.

79912249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36586.

The product of its digits is 81648, while the sum is 43.

The square root of 79912249 is about 8939.3651340573. The cubic root of 79912249 is about 430.7293355362.

The spelling of 79912249 in words is "seventy-nine million, nine hundred twelve thousand, two hundred forty-nine".