78607823 has 4 divisors (see below), whose sum is σ = 89837520. Its totient is φ = 67378128.

The previous prime is 78607801. The next prime is 78607843. The reversal of 78607823 is 32870687.

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 78607823 - 2¹⁶ = 78542287 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 (78607843) 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, 5614838 + ... + 5614851.

It is an arithmetic number, because the mean of its divisors is an integer number (22459380).

Almost surely, 2^78607823 is an apocalyptic number.

78607823 is a deficient number, since it is larger than the sum of its proper divisors (11229697).

78607823 is a wasteful number, since it uses less digits than its factorization.

78607823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229696.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 78607823 is about 8866.1052892462. The cubic root of 78607823 is about 428.3728354444.

The spelling of 78607823 in words is "seventy-eight million, six hundred seven thousand, eight hundred twenty-three".