78656943 has 16 divisors (see below), whose sum is σ = 111248640. Its totient is φ = 49262976.

The previous prime is 78656923. The next prime is 78656953. The reversal of 78656943 is 34965687.

It is not a de Polignac number, because 78656943 - 2⁵ = 78656911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78656892 and 78656901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78656923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36646 + ... + 38732.

It is an arithmetic number, because the mean of its divisors is an integer number (6953040).

Almost surely, 2^78656943 is an apocalyptic number.

78656943 is a deficient number, since it is larger than the sum of its proper divisors (32591697).

78656943 is a wasteful number, since it uses less digits than its factorization.

78656943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its digits is 1088640, while the sum is 48.

The square root of 78656943 is about 8868.8749568364. The cubic root of 78656943 is about 428.4620432424.

The spelling of 78656943 in words is "seventy-eight million, six hundred fifty-six thousand, nine hundred forty-three".