78921323 has 8 divisors (see below), whose sum is σ = 85253616. Its totient is φ = 72626400.

The previous prime is 78921301. The next prime is 78921329. The reversal of 78921323 is 32312987.

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 78921323 - 2⁸ = 78921067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78921329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4868 + ... + 13473.

It is an arithmetic number, because the mean of its divisors is an integer number (10656702).

Almost surely, 2^78921323 is an apocalyptic number.

78921323 is a deficient number, since it is larger than the sum of its proper divisors (6332293).

78921323 is a wasteful number, since it uses less digits than its factorization.

78921323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18685.

The product of its digits is 18144, while the sum is 35.

The square root of 78921323 is about 8883.7673877697. The cubic root of 78921323 is about 428.9415521607.

The spelling of 78921323 in words is "seventy-eight million, nine hundred twenty-one thousand, three hundred twenty-three".