78533923 has 8 divisors (see below), whose sum is σ = 85050000. Its totient is φ = 72085728.

The previous prime is 78533899. The next prime is 78533927. The reversal of 78533923 is 32933587.

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

It is not a de Polignac number, because 78533923 - 2¹⁷ = 78402851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78533927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14548 + ... + 19201.

It is an arithmetic number, because the mean of its divisors is an integer number (10631250).

Almost surely, 2^78533923 is an apocalyptic number.

78533923 is a deficient number, since it is larger than the sum of its proper divisors (6516077).

78533923 is a wasteful number, since it uses less digits than its factorization.

78533923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33941.

The product of its digits is 136080, while the sum is 40.

The square root of 78533923 is about 8861.9367522004. The cubic root of 78533923 is about 428.2385541613.

The spelling of 78533923 in words is "seventy-eight million, five hundred thirty-three thousand, nine hundred twenty-three".