27490261 has 2 divisors, whose sum is σ = 27490262. Its totient is φ = 27490260.

The previous prime is 27490259. The next prime is 27490279. The reversal of 27490261 is 16209472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21215236 + 6275025 = 4606^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 27490261 - 2¹ = 27490259 is a prime.

Together with 27490259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27490291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13745130 + 13745131.

It is an arithmetic number, because the mean of its divisors is an integer number (13745131).

Almost surely, 2^27490261 is an apocalyptic number.

It is an amenable number.

27490261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27490261 is an equidigital number, since it uses as much as digits as its factorization.

27490261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 27490261 is about 5243.1155814077. The cubic root of 27490261 is about 301.8049008147.

The spelling of 27490261 in words is "twenty-seven million, four hundred ninety thousand, two hundred sixty-one".