78947223 has 8 divisors (see below), whose sum is σ = 110803200. Its totient is φ = 49861368.

The previous prime is 78947213. The next prime is 78947249. The reversal of 78947223 is 32274987.

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

It is not a de Polignac number, because 78947223 - 2¹⁰ = 78946199 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947213) 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, 692463 + ... + 692576.

It is an arithmetic number, because the mean of its divisors is an integer number (13850400).

Almost surely, 2^78947223 is an apocalyptic number.

78947223 is a deficient number, since it is larger than the sum of its proper divisors (31855977).

78947223 is a wasteful number, since it uses less digits than its factorization.

78947223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385061.

The product of its digits is 169344, while the sum is 42.

The square root of 78947223 is about 8885.2249830829. The cubic root of 78947223 is about 428.9884696506.

The spelling of 78947223 in words is "seventy-eight million, nine hundred forty-seven thousand, two hundred twenty-three".