76851139 has 4 divisors (see below), whose sum is σ = 79330240. Its totient is φ = 74372040.

The previous prime is 76851133. The next prime is 76851149. The reversal of 76851139 is 93115867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93115867 = 13 ⋅7162759.

It is a cyclic number.

It is not a de Polignac number, because 76851139 - 2⁷ = 76851011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76851133) 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, 1239504 + ... + 1239565.

It is an arithmetic number, because the mean of its divisors is an integer number (19832560).

Almost surely, 2^76851139 is an apocalyptic number.

76851139 is a deficient number, since it is larger than the sum of its proper divisors (2479101).

76851139 is a wasteful number, since it uses less digits than its factorization.

76851139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479100.

The product of its digits is 45360, while the sum is 40.

The square root of 76851139 is about 8766.4781411922. The cubic root of 76851139 is about 425.1577527410.

The spelling of 76851139 in words is "seventy-six million, eight hundred fifty-one thousand, one hundred thirty-nine".