79915549 has 4 divisors (see below), whose sum is σ = 91332064. Its totient is φ = 68499036.

The previous prime is 79915529. The next prime is 79915553. The reversal of 79915549 is 94551997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94551997 = 3617 ⋅26141.

It is a cyclic number.

It is not a de Polignac number, because 79915549 - 2⁹ = 79915037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79915529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5708247 + ... + 5708260.

It is an arithmetic number, because the mean of its divisors is an integer number (22833016).

Almost surely, 2^79915549 is an apocalyptic number.

It is an amenable number.

79915549 is a deficient number, since it is larger than the sum of its proper divisors (11416515).

79915549 is a wasteful number, since it uses less digits than its factorization.

79915549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416514.

The product of its digits is 510300, while the sum is 49.

The square root of 79915549 is about 8939.5497090178. The cubic root of 79915549 is about 430.7352644864.

The spelling of 79915549 in words is "seventy-nine million, nine hundred fifteen thousand, five hundred forty-nine".