78876587 has 2 divisors, whose sum is σ = 78876588. Its totient is φ = 78876586.

The previous prime is 78876571. The next prime is 78876613. The reversal of 78876587 is 78567887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78876587 - 2⁴ = 78876571 is a prime.

It is not a weakly prime, because it can be changed into another prime (78876547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39438293 + 39438294.

It is an arithmetic number, because the mean of its divisors is an integer number (39438294).

Almost surely, 2^78876587 is an apocalyptic number.

78876587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78876587 is an equidigital number, since it uses as much as digits as its factorization.

78876587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5268480, while the sum is 56.

The square root of 78876587 is about 8881.2491801548. The cubic root of 78876587 is about 428.8604893358.

The spelling of 78876587 in words is "seventy-eight million, eight hundred seventy-six thousand, five hundred eighty-seven".