78955243 has 2 divisors, whose sum is σ = 78955244. Its totient is φ = 78955242.

The previous prime is 78955237. The next prime is 78955369. The reversal of 78955243 is 34255987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78955243 - 2⁹ = 78954731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78955243.

It is not a weakly prime, because it can be changed into another prime (78955043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477621 + 39477622.

It is an arithmetic number, because the mean of its divisors is an integer number (39477622).

Almost surely, 2^78955243 is an apocalyptic number.

78955243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78955243 is an equidigital number, since it uses as much as digits as its factorization.

78955243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 78955243 is about 8885.6762826473. The cubic root of 78955243 is about 429.0029956884.

The spelling of 78955243 in words is "seventy-eight million, nine hundred fifty-five thousand, two hundred forty-three".