27995899 has 4 divisors (see below), whose sum is σ = 29213136. Its totient is φ = 26778664.

The previous prime is 27995893. The next prime is 27995921. The reversal of 27995899 is 99859972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27995899 - 2⁷ = 27995771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27995893) 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 in 3 ways as a sum of consecutive naturals, for example, 608584 + ... + 608629.

It is an arithmetic number, because the mean of its divisors is an integer number (7303284).

Almost surely, 2^27995899 is an apocalyptic number.

27995899 is a deficient number, since it is larger than the sum of its proper divisors (1217237).

27995899 is a wasteful number, since it uses less digits than its factorization.

27995899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217236.

The product of its digits is 3674160, while the sum is 58.

The square root of 27995899 is about 5291.1150998632. The cubic root of 27995899 is about 303.6440714026.

The spelling of 27995899 in words is "twenty-seven million, nine hundred ninety-five thousand, eight hundred ninety-nine".