78693223 has 4 divisors (see below), whose sum is σ = 89935120. Its totient is φ = 67451328.

The previous prime is 78693203. The next prime is 78693229. The reversal of 78693223 is 32239687.

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

It is a de Polignac number, because none of the positive numbers 2^k-78693223 is a prime.

It is a super-2 number, since 2×78693223² = 12385246692255458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78693229) 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, 5620938 + ... + 5620951.

It is an arithmetic number, because the mean of its divisors is an integer number (22483780).

Almost surely, 2^78693223 is an apocalyptic number.

78693223 is a deficient number, since it is larger than the sum of its proper divisors (11241897).

78693223 is a wasteful number, since it uses less digits than its factorization.

78693223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241896.

The product of its digits is 108864, while the sum is 40.

The square root of 78693223 is about 8870.9200762942. The cubic root of 78693223 is about 428.5279082210.

The spelling of 78693223 in words is "seventy-eight million, six hundred ninety-three thousand, two hundred twenty-three".