78722223 has 16 divisors (see below), whose sum is σ = 111995136. Its totient is φ = 49013120.

The previous prime is 78722221. The next prime is 78722249. The reversal of 78722223 is 32222787.

It is a cyclic number.

It is not a de Polignac number, because 78722223 - 2¹ = 78722221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78722221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790 + ... + 12572.

It is an arithmetic number, because the mean of its divisors is an integer number (6999696).

Almost surely, 2^78722223 is an apocalyptic number.

78722223 is a deficient number, since it is larger than the sum of its proper divisors (33272913).

78722223 is a wasteful number, since it uses less digits than its factorization.

78722223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11934.

The product of its digits is 18816, while the sum is 33.

The square root of 78722223 is about 8872.5544799680. The cubic root of 78722223 is about 428.5805420760.

The spelling of 78722223 in words is "seventy-eight million, seven hundred twenty-two thousand, two hundred twenty-three".