27993499 has 2 divisors, whose sum is σ = 27993500. Its totient is φ = 27993498.

The previous prime is 27993491. The next prime is 27993523. The reversal of 27993499 is 99439972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27993499 - 2³ = 27993491 is a prime.

It is not a weakly prime, because it can be changed into another prime (27993491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13996749 + 13996750.

It is an arithmetic number, because the mean of its divisors is an integer number (13996750).

Almost surely, 2^27993499 is an apocalyptic number.

27993499 is a deficient number, since it is larger than the sum of its proper divisors (1).

27993499 is an equidigital number, since it uses as much as digits as its factorization.

27993499 is an evil number, because the sum of its binary digits is even.

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

The square root of 27993499 is about 5290.8882997092. Note that the first 3 decimals coincide. The cubic root of 27993499 is about 303.6353943389.

The spelling of 27993499 in words is "twenty-seven million, nine hundred ninety-three thousand, four hundred ninety-nine".