27940261 has 2 divisors, whose sum is σ = 27940262. Its totient is φ = 27940260.

The previous prime is 27940249. The next prime is 27940277. The reversal of 27940261 is 16204972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 5377761 = 4750^2 + 2319^2 .

It is a cyclic number.

It is not a de Polignac number, because 27940261 - 2¹⁷ = 27809189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27940201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13970130 + 13970131.

It is an arithmetic number, because the mean of its divisors is an integer number (13970131).

Almost surely, 2^27940261 is an apocalyptic number.

It is an amenable number.

27940261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27940261 is an equidigital number, since it uses as much as digits as its factorization.

27940261 is an odious number, because the sum of its binary digits is odd.

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

The square root of 27940261 is about 5285.8548031515. The cubic root of 27940261 is about 303.4427877215.

The spelling of 27940261 in words is "twenty-seven million, nine hundred forty thousand, two hundred sixty-one".