78913705 has 24 divisors (see below), whose sum is σ = 104775552. Its totient is φ = 57006144.

The previous prime is 78913697. The next prime is 78913721. The reversal of 78913705 is 50731987.

It is not a de Polignac number, because 78913705 - 2³ = 78913697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38722 + ... + 40708.

It is an arithmetic number, because the mean of its divisors is an integer number (4365648).

Almost surely, 2^78913705 is an apocalyptic number.

It is an amenable number.

78913705 is a deficient number, since it is larger than the sum of its proper divisors (25861847).

78913705 is a wasteful number, since it uses less digits than its factorization.

78913705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065 (or 2052 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 78913705 is about 8883.3386178846. The cubic root of 78913705 is about 428.9277503060.

The spelling of 78913705 in words is "seventy-eight million, nine hundred thirteen thousand, seven hundred five".