27243949 has 2 divisors, whose sum is σ = 27243950. Its totient is φ = 27243948.

The previous prime is 27243943. The next prime is 27243971. The reversal of 27243949 is 94934272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20088324 + 7155625 = 4482^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 27243949 - 2⁵ = 27243917 is a prime.

It is a super-2 number, since 2×27243949² = 1484465514229202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27243943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13621974 + 13621975.

It is an arithmetic number, because the mean of its divisors is an integer number (13621975).

Almost surely, 2^27243949 is an apocalyptic number.

It is an amenable number.

27243949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27243949 is an equidigital number, since it uses as much as digits as its factorization.

27243949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 27243949 is about 5219.5736415918. The cubic root of 27243949 is about 300.9008072618.

The spelling of 27243949 in words is "twenty-seven million, two hundred forty-three thousand, nine hundred forty-nine".