79866129 has 12 divisors (see below), whose sum is σ = 123874224. Its totient is φ = 45637704.

The previous prime is 79866121. The next prime is 79866133. The reversal of 79866129 is 92166897.

It is not a de Polignac number, because 79866129 - 2³ = 79866121 is a prime.

It is a super-2 number, since 2×79866129² = 12757197122889282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79866121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271507 + ... + 271800.

It is an arithmetic number, because the mean of its divisors is an integer number (10322852).

Almost surely, 2^79866129 is an apocalyptic number.

It is an amenable number.

79866129 is a deficient number, since it is larger than the sum of its proper divisors (44008095).

79866129 is a wasteful number, since it uses less digits than its factorization.

79866129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543324 (or 543317 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 79866129 is about 8936.7851602240. The cubic root of 79866129 is about 430.6464568784.

The spelling of 79866129 in words is "seventy-nine million, eight hundred sixty-six thousand, one hundred twenty-nine".