78913623 has 8 divisors (see below), whose sum is σ = 106260336. Its totient is φ = 52088000.

The previous prime is 78913619. The next prime is 78913633. The reversal of 78913623 is 32631987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78913623 - 2² = 78913619 is a prime.

It is a super-2 number, since 2×78913623² = 12454719789972258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78913613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129918 + ... + 130523.

It is an arithmetic number, because the mean of its divisors is an integer number (13282542).

Almost surely, 2^78913623 is an apocalyptic number.

78913623 is a deficient number, since it is larger than the sum of its proper divisors (27346713).

78913623 is a wasteful number, since it uses less digits than its factorization.

78913623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260545.

The product of its digits is 54432, while the sum is 39.

The square root of 78913623 is about 8883.3340025015. The cubic root of 78913623 is about 428.9276017383.

The spelling of 78913623 in words is "seventy-eight million, nine hundred thirteen thousand, six hundred twenty-three".