78580687 has 2 divisors, whose sum is σ = 78580688. Its totient is φ = 78580686.

The previous prime is 78580679. The next prime is 78580699. The reversal of 78580687 is 78608587.

It is a weak prime.

It is an emirp because it is prime and its reverse (78608587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78580687 - 2³ = 78580679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78580687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78580487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39290343 + 39290344.

It is an arithmetic number, because the mean of its divisors is an integer number (39290344).

Almost surely, 2^78580687 is an apocalyptic number.

78580687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78580687 is an equidigital number, since it uses as much as digits as its factorization.

78580687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 78580687 is about 8864.5748347002. The cubic root of 78580687 is about 428.3235372843.

The spelling of 78580687 in words is "seventy-eight million, five hundred eighty thousand, six hundred eighty-seven".