78904789199 has 2 divisors, whose sum is σ = 78904789200. Its totient is φ = 78904789198.

The previous prime is 78904789177. The next prime is 78904789303. The reversal of 78904789199 is 99198740987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78904789199 - 2⁸ = 78904788943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78904789109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39452394599 + 39452394600.

It is an arithmetic number, because the mean of its divisors is an integer number (39452394600).

Almost surely, 2^78904789199 is an apocalyptic number.

78904789199 is a deficient number, since it is larger than the sum of its proper divisors (1).

78904789199 is an equidigital number, since it uses as much as digits as its factorization.

78904789199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 71.

The spelling of 78904789199 in words is "seventy-eight billion, nine hundred four million, seven hundred eighty-nine thousand, one hundred ninety-nine".