78900959 has 2 divisors, whose sum is σ = 78900960. Its totient is φ = 78900958.

The previous prime is 78900953. The next prime is 78900989. The reversal of 78900959 is 95900987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78900959 - 2¹⁶ = 78835423 is a prime.

It is a super-2 number, since 2×78900959² = 12450722662239362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78900953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39450479 + 39450480.

It is an arithmetic number, because the mean of its divisors is an integer number (39450480).

Almost surely, 2^78900959 is an apocalyptic number.

78900959 is a deficient number, since it is larger than the sum of its proper divisors (1).

78900959 is an equidigital number, since it uses as much as digits as its factorization.

78900959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 78900959 is about 8882.6211784585. The cubic root of 78900959 is about 428.9046558491.

The spelling of 78900959 in words is "seventy-eight million, nine hundred thousand, nine hundred fifty-nine".