27313661 has 2 divisors, whose sum is σ = 27313662. Its totient is φ = 27313660.

The previous prime is 27313633. The next prime is 27313681. The reversal of 27313661 is 16631372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 13579225 = 3706^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 27313661 - 2⁶ = 27313597 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 (27313681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13656830 + 13656831.

It is an arithmetic number, because the mean of its divisors is an integer number (13656831).

Almost surely, 2^27313661 is an apocalyptic number.

It is an amenable number.

27313661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27313661 is an equidigital number, since it uses as much as digits as its factorization.

27313661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 27313661 is about 5226.2473152349. The cubic root of 27313661 is about 301.1572376708.

The spelling of 27313661 in words is "twenty-seven million, three hundred thirteen thousand, six hundred sixty-one".