78936723 has 12 divisors (see below), whose sum is σ = 114919168. Its totient is φ = 52209360.

The previous prime is 78936709. The next prime is 78936727. The reversal of 78936723 is 32763987.

It is a happy number.

It is not a de Polignac number, because 78936723 - 2⁴ = 78936707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78936727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33388 + ... + 35673.

Almost surely, 2^78936723 is an apocalyptic number.

78936723 is a deficient number, since it is larger than the sum of its proper divisors (35982445).

78936723 is a wasteful number, since it uses less digits than its factorization.

78936723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69194 (or 69191 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 78936723 is about 8884.6340948854. The cubic root of 78936723 is about 428.9694502835.

The spelling of 78936723 in words is "seventy-eight million, nine hundred thirty-six thousand, seven hundred twenty-three".