27311657 has 2 divisors, whose sum is σ = 27311658. Its totient is φ = 27311656.

The previous prime is 27311621. The next prime is 27311689. The reversal of 27311657 is 75611372.

It is an a-pointer prime, because the next prime (27311689) can be obtained adding 27311657 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 3701776 = 4859^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 27311657 - 2⁶ = 27311593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27311057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13655828 + 13655829.

It is an arithmetic number, because the mean of its divisors is an integer number (13655829).

Almost surely, 2^27311657 is an apocalyptic number.

It is an amenable number.

27311657 is a deficient number, since it is larger than the sum of its proper divisors (1).

27311657 is an equidigital number, since it uses as much as digits as its factorization.

27311657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 27311657 is about 5226.0555871517. The cubic root of 27311657 is about 301.1498722006.

The spelling of 27311657 in words is "twenty-seven million, three hundred eleven thousand, six hundred fifty-seven".