78604879 has 4 divisors (see below), whose sum is σ = 78951384. Its totient is φ = 78258376.

The previous prime is 78604853. The next prime is 78604891. The reversal of 78604879 is 97840687.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78604879 - 2¹⁷ = 78473807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78604829) 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, 172912 + ... + 173365.

It is an arithmetic number, because the mean of its divisors is an integer number (19737846).

Almost surely, 2^78604879 is an apocalyptic number.

78604879 is a deficient number, since it is larger than the sum of its proper divisors (346505).

78604879 is a wasteful number, since it uses less digits than its factorization.

78604879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346504.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 78604879 is about 8865.9392621425. The cubic root of 78604879 is about 428.3674876078.

The spelling of 78604879 in words is "seventy-eight million, six hundred four thousand, eight hundred seventy-nine".