76872129 has 4 divisors (see below), whose sum is σ = 102496176. Its totient is φ = 51248084.

The previous prime is 76872121. The next prime is 76872151. The reversal of 76872129 is 92127867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76872129 - 2³ = 76872121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76872121) 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, 12812019 + ... + 12812024.

It is an arithmetic number, because the mean of its divisors is an integer number (25624044).

Almost surely, 2^76872129 is an apocalyptic number.

It is an amenable number.

76872129 is a deficient number, since it is larger than the sum of its proper divisors (25624047).

76872129 is a wasteful number, since it uses less digits than its factorization.

76872129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25624046.

The product of its digits is 84672, while the sum is 42.

The square root of 76872129 is about 8767.6752334926. The cubic root of 76872129 is about 425.1964563482.

The spelling of 76872129 in words is "seventy-six million, eight hundred seventy-two thousand, one hundred twenty-nine".