79775129 has 16 divisors (see below), whose sum is σ = 97553280. Its totient is φ = 63711360.

The previous prime is 79775107. The next prime is 79775131. The reversal of 79775129 is 92157797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79775129 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79775149) 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 15 ways as a sum of consecutive naturals, for example, 3197 + ... + 13029.

It is an arithmetic number, because the mean of its divisors is an integer number (6097080).

Almost surely, 2^79775129 is an apocalyptic number.

It is an amenable number.

79775129 is a deficient number, since it is larger than the sum of its proper divisors (17778151).

79775129 is a wasteful number, since it uses less digits than its factorization.

79775129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920.

The product of its digits is 277830, while the sum is 47.

The square root of 79775129 is about 8931.6923928223. The cubic root of 79775129 is about 430.4828342368.

The spelling of 79775129 in words is "seventy-nine million, seven hundred seventy-five thousand, one hundred twenty-nine".