78077959 has 2 divisors, whose sum is σ = 78077960. Its totient is φ = 78077958.

The previous prime is 78077941. The next prime is 78077963. The reversal of 78077959 is 95977087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78077959 - 2¹¹ = 78075911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78077999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39038979 + 39038980.

It is an arithmetic number, because the mean of its divisors is an integer number (39038980).

Almost surely, 2^78077959 is an apocalyptic number.

78077959 is a deficient number, since it is larger than the sum of its proper divisors (1).

78077959 is an equidigital number, since it uses as much as digits as its factorization.

78077959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 78077959 is about 8836.1733233340. The cubic root of 78077959 is about 427.4081678653.

The spelling of 78077959 in words is "seventy-eight million, seventy-seven thousand, nine hundred fifty-nine".