78104847 has 4 divisors (see below), whose sum is σ = 104139800. Its totient is φ = 52069896.

The previous prime is 78104833. The next prime is 78104857. The reversal of 78104847 is 74840187.

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

It is not a de Polignac number, because 78104847 - 2¹⁸ = 77842703 is a prime.

It is a super-2 number, since 2×78104847² = 12200734249786818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78104857) 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, 13017472 + ... + 13017477.

It is an arithmetic number, because the mean of its divisors is an integer number (26034950).

Almost surely, 2^78104847 is an apocalyptic number.

78104847 is a deficient number, since it is larger than the sum of its proper divisors (26034953).

78104847 is a wasteful number, since it uses less digits than its factorization.

78104847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26034952.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 78104847 is about 8837.6946654656. The cubic root of 78104847 is about 427.4572249531.

The spelling of 78104847 in words is "seventy-eight million, one hundred four thousand, eight hundred forty-seven".