27968999 has 2 divisors, whose sum is σ = 27969000. Its totient is φ = 27968998.

The previous prime is 27968977. The next prime is 27969013. The reversal of 27968999 is 99986972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27968999 - 2²⁴ = 11191783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27968909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13984499 + 13984500.

It is an arithmetic number, because the mean of its divisors is an integer number (13984500).

Almost surely, 2^27968999 is an apocalyptic number.

27968999 is a deficient number, since it is larger than the sum of its proper divisors (1).

27968999 is an equidigital number, since it uses as much as digits as its factorization.

27968999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 27968999 is about 5288.5724917032. The cubic root of 27968999 is about 303.5467875943.

The spelling of 27968999 in words is "twenty-seven million, nine hundred sixty-eight thousand, nine hundred ninety-nine".