78920599 has 2 divisors, whose sum is σ = 78920600. Its totient is φ = 78920598.

The previous prime is 78920587. The next prime is 78920713. The reversal of 78920599 is 99502987.

It is a weak prime.

It is an emirp because it is prime and its reverse (99502987) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78920599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78920549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39460299 + 39460300.

It is an arithmetic number, because the mean of its divisors is an integer number (39460300).

Almost surely, 2^78920599 is an apocalyptic number.

78920599 is a deficient number, since it is larger than the sum of its proper divisors (1).

78920599 is an equidigital number, since it uses as much as digits as its factorization.

78920599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 78920599 is about 8883.7266391982. The cubic root of 78920599 is about 428.9402404973.

The spelling of 78920599 in words is "seventy-eight million, nine hundred twenty thousand, five hundred ninety-nine".