78519223 has 4 divisors (see below), whose sum is σ = 80434368. Its totient is φ = 76604080.

The previous prime is 78519179. The next prime is 78519239. The reversal of 78519223 is 32291587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78519223 - 2²⁵ = 44964791 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 (78519323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957511 + ... + 957592.

It is an arithmetic number, because the mean of its divisors is an integer number (20108592).

Almost surely, 2^78519223 is an apocalyptic number.

78519223 is a deficient number, since it is larger than the sum of its proper divisors (1915145).

78519223 is a wasteful number, since it uses less digits than its factorization.

78519223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915144.

The product of its digits is 30240, while the sum is 37.

The square root of 78519223 is about 8861.1073235798. The cubic root of 78519223 is about 428.2118332263.

The spelling of 78519223 in words is "seventy-eight million, five hundred nineteen thousand, two hundred twenty-three".