78903823 has 8 divisors (see below), whose sum is σ = 83564928. Its totient is φ = 74345304.

The previous prime is 78903821. The next prime is 78903829. The reversal of 78903823 is 32830987.

It is a happy number.

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 78903823 - 2¹ = 78903821 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 (78903821) 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, 24061 + ... + 27142.

It is an arithmetic number, because the mean of its divisors is an integer number (10445616).

Almost surely, 2^78903823 is an apocalyptic number.

78903823 is a deficient number, since it is larger than the sum of its proper divisors (4661105).

78903823 is a wasteful number, since it uses less digits than its factorization.

78903823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51293.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78903823 is about 8882.7823906702. The cubic root of 78903823 is about 428.9098453427.

The spelling of 78903823 in words is "seventy-eight million, nine hundred three thousand, eight hundred twenty-three".