27398999 has 2 divisors, whose sum is σ = 27399000. Its totient is φ = 27398998.

The previous prime is 27398953. The next prime is 27399013. The reversal of 27398999 is 99989372.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27398999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27398929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699499 + 13699500.

It is an arithmetic number, because the mean of its divisors is an integer number (13699500).

Almost surely, 2^27398999 is an apocalyptic number.

27398999 is a deficient number, since it is larger than the sum of its proper divisors (1).

27398999 is an equidigital number, since it uses as much as digits as its factorization.

27398999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 56.

The square root of 27398999 is about 5234.4053148376. The cubic root of 27398999 is about 301.4705538670.

The spelling of 27398999 in words is "twenty-seven million, three hundred ninety-eight thousand, nine hundred ninety-nine".