78648587 has 2 divisors, whose sum is σ = 78648588. Its totient is φ = 78648586.

The previous prime is 78648571. The next prime is 78648611. The reversal of 78648587 is 78584687.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78584687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78648587 - 2⁴ = 78648571 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78648517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39324293 + 39324294.

It is an arithmetic number, because the mean of its divisors is an integer number (39324294).

Almost surely, 2^78648587 is an apocalyptic number.

78648587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78648587 is an equidigital number, since it uses as much as digits as its factorization.

78648587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 53.

The square root of 78648587 is about 8868.4038586433. The cubic root of 78648587 is about 428.4468703686.

The spelling of 78648587 in words is "seventy-eight million, six hundred forty-eight thousand, five hundred eighty-seven".