79977249 has 27 divisors (see below), whose sum is σ = 127449777. Its totient is φ = 48292200.

The previous prime is 79977199. The next prime is 79977253. The reversal of 79977249 is 94277997.

The square root of 79977249 is 8943.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 79977249 - 2⁹ = 79976737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79977195 and 79977204.

It is not an unprimeable number, because it can be changed into a prime (79977349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 294984 + ... + 295254.

Almost surely, 2^79977249 is an apocalyptic number.

79977249 is the 8943-rd square number.

79977249 is the 4472-nd centered octagonal number.

It is an amenable number.

79977249 is a deficient number, since it is larger than the sum of its proper divisors (47472528).

79977249 is a wasteful number, since it uses less digits than its factorization.

79977249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 285 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The cubic root of 79977249 is about 430.8460878473.

The spelling of 79977249 in words is "seventy-nine million, nine hundred seventy-seven thousand, two hundred forty-nine".