79178587 has 2 divisors, whose sum is σ = 79178588. Its totient is φ = 79178586.

The previous prime is 79178543. The next prime is 79178591. The reversal of 79178587 is 78587197.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79178587 - 2⁷ = 79178459 is a prime.

It is not a weakly prime, because it can be changed into another prime (79178507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39589293 + 39589294.

It is an arithmetic number, because the mean of its divisors is an integer number (39589294).

Almost surely, 2^79178587 is an apocalyptic number.

79178587 is a deficient number, since it is larger than the sum of its proper divisors (1).

79178587 is an equidigital number, since it uses as much as digits as its factorization.

79178587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 52.

The square root of 79178587 is about 8898.2350497163. The cubic root of 79178587 is about 429.4071277747.

The spelling of 79178587 in words is "seventy-nine million, one hundred seventy-eight thousand, five hundred eighty-seven".