78975223 has 2 divisors, whose sum is σ = 78975224. Its totient is φ = 78975222.

The previous prime is 78975209. The next prime is 78975263. The reversal of 78975223 is 32257987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78975223 - 2²¹ = 76878071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78975223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78975263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39487611 + 39487612.

It is an arithmetic number, because the mean of its divisors is an integer number (39487612).

Almost surely, 2^78975223 is an apocalyptic number.

78975223 is a deficient number, since it is larger than the sum of its proper divisors (1).

78975223 is an equidigital number, since it uses as much as digits as its factorization.

78975223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 78975223 is about 8886.8004928658. The cubic root of 78975223 is about 429.0391797196.

The spelling of 78975223 in words is "seventy-eight million, nine hundred seventy-five thousand, two hundred twenty-three".