27399959 has 2 divisors, whose sum is σ = 27399960. Its totient is φ = 27399958.

The previous prime is 27399949. The next prime is 27399989. The reversal of 27399959 is 95999372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27399959 - 2¹⁶ = 27334423 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27399959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27399949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699979 + 13699980.

It is an arithmetic number, because the mean of its divisors is an integer number (13699980).

Almost surely, 2^27399959 is an apocalyptic number.

27399959 is a deficient number, since it is larger than the sum of its proper divisors (1).

27399959 is an equidigital number, since it uses as much as digits as its factorization.

27399959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 53.

The square root of 27399959 is about 5234.4970149958. The cubic root of 27399959 is about 301.4740747784.

The spelling of 27399959 in words is "twenty-seven million, three hundred ninety-nine thousand, nine hundred fifty-nine".