27621313 has 2 divisors, whose sum is σ = 27621314. Its totient is φ = 27621312.

The previous prime is 27621271. The next prime is 27621329. The reversal of 27621313 is 31312672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25725184 + 1896129 = 5072^2 + 1377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27621313 is a prime.

It is not a weakly prime, because it can be changed into another prime (27631313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13810656 + 13810657.

It is an arithmetic number, because the mean of its divisors is an integer number (13810657).

Almost surely, 2^27621313 is an apocalyptic number.

It is an amenable number.

27621313 is a deficient number, since it is larger than the sum of its proper divisors (1).

27621313 is an equidigital number, since it uses as much as digits as its factorization.

27621313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 27621313 is about 5255.5982532914. The cubic root of 27621313 is about 302.2837303974.

Adding to 27621313 its reverse (31312672), we get a palindrome (58933985).

The spelling of 27621313 in words is "twenty-seven million, six hundred twenty-one thousand, three hundred thirteen".