76899139 has 4 divisors (see below), whose sum is σ = 77060160. Its totient is φ = 76738120.

The previous prime is 76899103. The next prime is 76899167. The reversal of 76899139 is 93199867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93199867 = 137 ⋅680291.

It is a cyclic number.

It is not a de Polignac number, because 76899139 - 2¹⁵ = 76866371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76899539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79792 + ... + 80749.

It is an arithmetic number, because the mean of its divisors is an integer number (19265040).

Almost surely, 2^76899139 is an apocalyptic number.

76899139 is a deficient number, since it is larger than the sum of its proper divisors (161021).

76899139 is a wasteful number, since it uses less digits than its factorization.

76899139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161020.

The product of its digits is 734832, while the sum is 52.

The square root of 76899139 is about 8769.2154153037. The cubic root of 76899139 is about 425.2462499106.

The spelling of 76899139 in words is "seventy-six million, eight hundred ninety-nine thousand, one hundred thirty-nine".