27129499 has 2 divisors, whose sum is σ = 27129500. Its totient is φ = 27129498.

The previous prime is 27129493. The next prime is 27129503. The reversal of 27129499 is 99492172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27129499 - 2³ = 27129491 is a prime.

It is not a weakly prime, because it can be changed into another prime (27129491) 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, 13564749 + 13564750.

It is an arithmetic number, because the mean of its divisors is an integer number (13564750).

Almost surely, 2^27129499 is an apocalyptic number.

27129499 is a deficient number, since it is larger than the sum of its proper divisors (1).

27129499 is an equidigital number, since it uses as much as digits as its factorization.

27129499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 27129499 is about 5208.5985639133. The cubic root of 27129499 is about 300.4788611592.

The spelling of 27129499 in words is "twenty-seven million, one hundred twenty-nine thousand, four hundred ninety-nine".