79842729 has 16 divisors (see below), whose sum is σ = 111348864. Its totient is φ = 50793600.

The previous prime is 79842691. The next prime is 79842743. The reversal of 79842729 is 92724897.

It is not a de Polignac number, because 79842729 - 2¹¹ = 79840681 is a prime.

It is a super-2 number, since 2×79842729² = 12749722748334882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79842799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34839 + ... + 37059.

It is an arithmetic number, because the mean of its divisors is an integer number (6959304).

Almost surely, 2^79842729 is an apocalyptic number.

It is an amenable number.

79842729 is a deficient number, since it is larger than the sum of its proper divisors (31506135).

79842729 is a wasteful number, since it uses less digits than its factorization.

79842729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its digits is 508032, while the sum is 48.

The square root of 79842729 is about 8935.4758686933. The cubic root of 79842729 is about 430.6043943606.

The spelling of 79842729 in words is "seventy-nine million, eight hundred forty-two thousand, seven hundred twenty-nine".