27157397 has 2 divisors, whose sum is σ = 27157398. Its totient is φ = 27157396.

The previous prime is 27157391. The next prime is 27157409. The reversal of 27157397 is 79375172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27133681 + 23716 = 5209^2 + 154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27157397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27157391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578698 + 13578699.

It is an arithmetic number, because the mean of its divisors is an integer number (13578699).

Almost surely, 2^27157397 is an apocalyptic number.

It is an amenable number.

27157397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27157397 is an equidigital number, since it uses as much as digits as its factorization.

27157397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 41.

The square root of 27157397 is about 5211.2759474048. The cubic root of 27157397 is about 300.5818227301.

The spelling of 27157397 in words is "twenty-seven million, one hundred fifty-seven thousand, three hundred ninety-seven".