78699059 has 2 divisors, whose sum is σ = 78699060. Its totient is φ = 78699058.

The previous prime is 78699053. The next prime is 78699079. The reversal of 78699059 is 95099687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78699059 - 2⁴ = 78699043 is a prime.

It is a super-4 number, since 4×78699059⁴ (a number of 33 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78699059.

It is not a weakly prime, because it can be changed into another prime (78699053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39349529 + 39349530.

It is an arithmetic number, because the mean of its divisors is an integer number (39349530).

Almost surely, 2^78699059 is an apocalyptic number.

78699059 is a deficient number, since it is larger than the sum of its proper divisors (1).

78699059 is an equidigital number, since it uses as much as digits as its factorization.

78699059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 78699059 is about 8871.2490101451. The cubic root of 78699059 is about 428.5385013697.

The spelling of 78699059 in words is "seventy-eight million, six hundred ninety-nine thousand, fifty-nine".