78675559 has 2 divisors, whose sum is σ = 78675560. Its totient is φ = 78675558.

The previous prime is 78675539. The next prime is 78675577. The reversal of 78675559 is 95557687.

It is a strong prime.

It is an emirp because it is prime and its reverse (95557687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78675559 - 2²¹ = 76578407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78675539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39337779 + 39337780.

It is an arithmetic number, because the mean of its divisors is an integer number (39337780).

Almost surely, 2^78675559 is an apocalyptic number.

78675559 is a deficient number, since it is larger than the sum of its proper divisors (1).

78675559 is an equidigital number, since it uses as much as digits as its factorization.

78675559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 52.

The square root of 78675559 is about 8869.9244077951. The cubic root of 78675559 is about 428.4958424212.

The spelling of 78675559 in words is "seventy-eight million, six hundred seventy-five thousand, five hundred fifty-nine".