27157987 has 2 divisors, whose sum is σ = 27157988. Its totient is φ = 27157986.

The previous prime is 27157979. The next prime is 27158029. The reversal of 27157987 is 78975172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27157987 - 2³ = 27157979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27157927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578993 + 13578994.

It is an arithmetic number, because the mean of its divisors is an integer number (13578994).

Almost surely, 2^27157987 is an apocalyptic number.

27157987 is a deficient number, since it is larger than the sum of its proper divisors (1).

27157987 is an equidigital number, since it uses as much as digits as its factorization.

27157987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 46.

The square root of 27157987 is about 5211.3325551149. The cubic root of 27157987 is about 300.5839994482.

The spelling of 27157987 in words is "twenty-seven million, one hundred fifty-seven thousand, nine hundred eighty-seven".