27399949 has 2 divisors, whose sum is σ = 27399950. Its totient is φ = 27399948.

The previous prime is 27399947. The next prime is 27399959. The reversal of 27399949 is 94999372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22155849 + 5244100 = 4707^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 27399949 - 2¹ = 27399947 is a prime.

Together with 27399947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 27399896 and 27399905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27399941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699974 + 13699975.

It is an arithmetic number, because the mean of its divisors is an integer number (13699975).

Almost surely, 2^27399949 is an apocalyptic number.

It is an amenable number.

27399949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27399949 is an equidigital number, since it uses as much as digits as its factorization.

27399949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 52.

The square root of 27399949 is about 5234.4960597941. The cubic root of 27399949 is about 301.4740381027.

The spelling of 27399949 in words is "twenty-seven million, three hundred ninety-nine thousand, nine hundred forty-nine".