27157297 has 4 divisors (see below), whose sum is σ = 27891316. Its totient is φ = 26423280.

The previous prime is 27157259. The next prime is 27157301. The reversal of 27157297 is 79275172.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 11029041 = 4016^2 + 3321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27157297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27157397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366954 + ... + 367027.

It is an arithmetic number, because the mean of its divisors is an integer number (6972829).

Almost surely, 2^27157297 is an apocalyptic number.

It is an amenable number.

27157297 is a deficient number, since it is larger than the sum of its proper divisors (734019).

27157297 is an equidigital number, since it uses as much as digits as its factorization.

27157297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734018.

The product of its digits is 61740, while the sum is 40.

The square root of 27157297 is about 5211.2663528168. The cubic root of 27157297 is about 300.5814537917.

The spelling of 27157297 in words is "twenty-seven million, one hundred fifty-seven thousand, two hundred ninety-seven".