79998727 has 4 divisors (see below), whose sum is σ = 80018920. Its totient is φ = 79978536.

The previous prime is 79998701. The next prime is 79998757. The reversal of 79998727 is 72789997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79998727 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 (79998757) 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, 1977 + ... + 12802.

It is an arithmetic number, because the mean of its divisors is an integer number (20004730).

Almost surely, 2^79998727 is an apocalyptic number.

79998727 is a deficient number, since it is larger than the sum of its proper divisors (20193).

79998727 is a wasteful number, since it uses less digits than its factorization.

79998727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192.

The product of its digits is 4000752, while the sum is 58.

The square root of 79998727 is about 8944.2007468527. The cubic root of 79998727 is about 430.8846524981.

The spelling of 79998727 in words is "seventy-nine million, nine hundred ninety-eight thousand, seven hundred twenty-seven".