78715223 has 4 divisors (see below), whose sum is σ = 82137648. Its totient is φ = 75292800.

The previous prime is 78715213. The next prime is 78715267. The reversal of 78715223 is 32251787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32251787 = 4339 ⋅7433.

It is not a de Polignac number, because 78715223 - 2⁴ = 78715207 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 (78715213) 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 3 ways as a sum of consecutive naturals, for example, 1711178 + ... + 1711223.

It is an arithmetic number, because the mean of its divisors is an integer number (20534412).

Almost surely, 2^78715223 is an apocalyptic number.

78715223 is a deficient number, since it is larger than the sum of its proper divisors (3422425).

78715223 is a wasteful number, since it uses less digits than its factorization.

78715223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422424.

The product of its digits is 23520, while the sum is 35.

The square root of 78715223 is about 8872.1599963030. The cubic root of 78715223 is about 428.5678385361.

The spelling of 78715223 in words is "seventy-eight million, seven hundred fifteen thousand, two hundred twenty-three".