78802223 has 2 divisors, whose sum is σ = 78802224. Its totient is φ = 78802222.

The previous prime is 78802211. The next prime is 78802237. The reversal of 78802223 is 32220887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78802223 - 2⁶ = 78802159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78802223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78802723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39401111 + 39401112.

It is an arithmetic number, because the mean of its divisors is an integer number (39401112).

Almost surely, 2^78802223 is an apocalyptic number.

78802223 is a deficient number, since it is larger than the sum of its proper divisors (1).

78802223 is an equidigital number, since it uses as much as digits as its factorization.

78802223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 78802223 is about 8877.0616197028. The cubic root of 78802223 is about 428.7256719360.

The spelling of 78802223 in words is "seventy-eight million, eight hundred two thousand, two hundred twenty-three".