76878979 has 4 divisors (see below), whose sum is σ = 76915584. Its totient is φ = 76842376.

The previous prime is 76878961. The next prime is 76878983. The reversal of 76878979 is 97987867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97987867 = 4813 ⋅20359.

It is a cyclic number.

It is not a de Polignac number, because 76878979 - 2²³ = 68490371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76878079) 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, 14947 + ... + 19420.

It is an arithmetic number, because the mean of its divisors is an integer number (19228896).

Almost surely, 2^76878979 is an apocalyptic number.

76878979 is a deficient number, since it is larger than the sum of its proper divisors (36605).

76878979 is a wasteful number, since it uses less digits than its factorization.

76878979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36604.

The product of its digits is 10668672, while the sum is 61.

The square root of 76878979 is about 8768.0658642599. The cubic root of 76878979 is about 425.2090855861.

The spelling of 76878979 in words is "seventy-six million, eight hundred seventy-eight thousand, nine hundred seventy-nine".