27979249 has 2 divisors, whose sum is σ = 27979250. Its totient is φ = 27979248.

The previous prime is 27979213. The next prime is 27979309. The reversal of 27979249 is 94297972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 11778624 = 4025^2 + 3432^2 .

It is a cyclic number.

It is not a de Polignac number, because 27979249 - 2¹³ = 27971057 is a prime.

It is not a weakly prime, because it can be changed into another prime (27979649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13989624 + 13989625.

It is an arithmetic number, because the mean of its divisors is an integer number (13989625).

Almost surely, 2^27979249 is an apocalyptic number.

It is an amenable number.

27979249 is a deficient number, since it is larger than the sum of its proper divisors (1).

27979249 is an equidigital number, since it uses as much as digits as its factorization.

27979249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 27979249 is about 5289.5414735117. The cubic root of 27979249 is about 303.5838640561.

It can be divided in two parts, 279792 and 49, that added together give a 4-th power (279841 = 23⁴).

The spelling of 27979249 in words is "twenty-seven million, nine hundred seventy-nine thousand, two hundred forty-nine".