78760399 has 2 divisors, whose sum is σ = 78760400. Its totient is φ = 78760398.

The previous prime is 78760387. The next prime is 78760421. The reversal of 78760399 is 99306787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78760399 - 2⁹ = 78759887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78700399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39380199 + 39380200.

It is an arithmetic number, because the mean of its divisors is an integer number (39380200).

Almost surely, 2^78760399 is an apocalyptic number.

78760399 is a deficient number, since it is larger than the sum of its proper divisors (1).

78760399 is an equidigital number, since it uses as much as digits as its factorization.

78760399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 78760399 is about 8874.7055725810. The cubic root of 78760399 is about 428.6498103040.

The spelling of 78760399 in words is "seventy-eight million, seven hundred sixty thousand, three hundred ninety-nine".