78607687 has 2 divisors, whose sum is σ = 78607688. Its totient is φ = 78607686.

The previous prime is 78607681. The next prime is 78607709. The reversal of 78607687 is 78670687.

It is a weak prime.

It is an emirp because it is prime and its reverse (78670687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78607687 - 2³ = 78607679 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78607687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78607681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39303843 + 39303844.

It is an arithmetic number, because the mean of its divisors is an integer number (39303844).

Almost surely, 2^78607687 is an apocalyptic number.

78607687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78607687 is an equidigital number, since it uses as much as digits as its factorization.

78607687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 78607687 is about 8866.0976195844. The cubic root of 78607687 is about 428.3725884005.

The spelling of 78607687 in words is "seventy-eight million, six hundred seven thousand, six hundred eighty-seven".