79726513 has 4 divisors (see below), whose sum is σ = 82298368. Its totient is φ = 77154660.

The previous prime is 79726463. The next prime is 79726541. The reversal of 79726513 is 31562797.

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: 31562797 = 7 ⋅4508971.

It is not a de Polignac number, because 79726513 - 2¹⁷ = 79595441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79726613) 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 3 ways as a sum of consecutive naturals, for example, 1285881 + ... + 1285942.

It is an arithmetic number, because the mean of its divisors is an integer number (20574592).

Almost surely, 2^79726513 is an apocalyptic number.

It is an amenable number.

79726513 is a deficient number, since it is larger than the sum of its proper divisors (2571855).

79726513 is a wasteful number, since it uses less digits than its factorization.

79726513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571854.

The product of its digits is 79380, while the sum is 40.

The square root of 79726513 is about 8928.9704333702. The cubic root of 79726513 is about 430.3953691897.

The spelling of 79726513 in words is "seventy-nine million, seven hundred twenty-six thousand, five hundred thirteen".