27992999 has 4 divisors (see below), whose sum is σ = 29639664. Its totient is φ = 26346336.

The previous prime is 27992989. The next prime is 27993011. The reversal of 27992999 is 99929972.

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 27992999 - 2⁴ = 27992983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27992989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823307 + ... + 823340.

It is an arithmetic number, because the mean of its divisors is an integer number (7409916).

Almost surely, 2^27992999 is an apocalyptic number.

27992999 is a deficient number, since it is larger than the sum of its proper divisors (1646665).

27992999 is a wasteful number, since it uses less digits than its factorization.

27992999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646664.

The product of its digits is 1653372, while the sum is 56.

The square root of 27992999 is about 5290.8410484534. The cubic root of 27992999 is about 303.6335865548.

The spelling of 27992999 in words is "twenty-seven million, nine hundred ninety-two thousand, nine hundred ninety-nine".