27640241 has 2 divisors, whose sum is σ = 27640242. Its totient is φ = 27640240.

The previous prime is 27640237. The next prime is 27640243. The reversal of 27640241 is 14204672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24049216 + 3591025 = 4904^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 27640241 - 2² = 27640237 is a prime.

It is a Sophie Germain prime.

Together with 27640243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27640241.

It is not a weakly prime, because it can be changed into another prime (27640243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13820120 + 13820121.

It is an arithmetic number, because the mean of its divisors is an integer number (13820121).

Almost surely, 2^27640241 is an apocalyptic number.

It is an amenable number.

27640241 is a deficient number, since it is larger than the sum of its proper divisors (1).

27640241 is an equidigital number, since it uses as much as digits as its factorization.

27640241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 27640241 is about 5257.3986913682. The cubic root of 27640241 is about 302.3527630800.

The spelling of 27640241 in words is "twenty-seven million, six hundred forty thousand, two hundred forty-one".