27432749 has 2 divisors, whose sum is σ = 27432750. Its totient is φ = 27432748.

The previous prime is 27432733. The next prime is 27432761. The reversal of 27432749 is 94723472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 13557124 = 3725^2 + 3682^2 .

It is a cyclic number.

It is not a de Polignac number, because 27432749 - 2⁴ = 27432733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27432709) 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, 13716374 + 13716375.

It is an arithmetic number, because the mean of its divisors is an integer number (13716375).

Almost surely, 2^27432749 is an apocalyptic number.

It is an amenable number.

27432749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27432749 is an equidigital number, since it uses as much as digits as its factorization.

27432749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 27432749 is about 5237.6281845889. The cubic root of 27432749 is about 301.5942865668.

The spelling of 27432749 in words is "twenty-seven million, four hundred thirty-two thousand, seven hundred forty-nine".