27157901 has 2 divisors, whose sum is σ = 27157902. Its totient is φ = 27157900.

The previous prime is 27157873. The next prime is 27157903. The reversal of 27157901 is 10975172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 6916900 = 4499^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 27157901 - 2²² = 22963597 is a prime.

Together with 27157903, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1692338 and since 27157901 and 1692338 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27157903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578950 + 13578951.

It is an arithmetic number, because the mean of its divisors is an integer number (13578951).

Almost surely, 2^27157901 is an apocalyptic number.

It is an amenable number.

27157901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27157901 is an equidigital number, since it uses as much as digits as its factorization.

27157901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 27157901 is about 5211.3243038598. The cubic root of 27157901 is about 300.5836821658.

The spelling of 27157901 in words is "twenty-seven million, one hundred fifty-seven thousand, nine hundred one".