79997249 has 4 divisors (see below), whose sum is σ = 80020164. Its totient is φ = 79974336.

The previous prime is 79997237. The next prime is 79997251. The reversal of 79997249 is 94279997.

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 64513024 + 15484225 = 8032^2 + 3935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79997249 is a prime.

It is a deceptive number, since it divides R_79997248.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79997194 and 79997203.

It is not an unprimeable number, because it can be changed into a prime (79997279) 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, 5012 + ... + 13605.

It is an arithmetic number, because the mean of its divisors is an integer number (20005041).

Almost surely, 2^79997249 is an apocalyptic number.

It is an amenable number.

79997249 is a deficient number, since it is larger than the sum of its proper divisors (22915).

79997249 is a wasteful number, since it uses less digits than its factorization.

79997249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22914.

The product of its digits is 2571912, while the sum is 56.

The square root of 79997249 is about 8944.1181231019. The cubic root of 79997249 is about 430.8819989082.

The spelling of 79997249 in words is "seventy-nine million, nine hundred ninety-seven thousand, two hundred forty-nine".