79620729 has 16 divisors (see below), whose sum is σ = 109556160. Its totient is φ = 51402240.

The previous prime is 79620727. The next prime is 79620763. The reversal of 79620729 is 92702697.

It is not a de Polignac number, because 79620729 - 2¹ = 79620727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79620727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14769 + ... + 19425.

It is an arithmetic number, because the mean of its divisors is an integer number (6847260).

Almost surely, 2^79620729 is an apocalyptic number.

It is an amenable number.

79620729 is a deficient number, since it is larger than the sum of its proper divisors (29935431).

79620729 is a wasteful number, since it uses less digits than its factorization.

79620729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 79620729 is about 8923.0448278601. The cubic root of 79620729 is about 430.2049302614.

The spelling of 79620729 in words is "seventy-nine million, six hundred twenty thousand, seven hundred twenty-nine".