27994331 has 2 divisors, whose sum is σ = 27994332. Its totient is φ = 27994330.

The previous prime is 27994313. The next prime is 27994339. The reversal of 27994331 is 13349972.

Together with previous prime (27994313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27994331 is a prime.

It is a super-2 number, since 2×27994331² = 1567365136275122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27994339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13997165 + 13997166.

It is an arithmetic number, because the mean of its divisors is an integer number (13997166).

Almost surely, 2^27994331 is an apocalyptic number.

27994331 is a deficient number, since it is larger than the sum of its proper divisors (1).

27994331 is an equidigital number, since it uses as much as digits as its factorization.

27994331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 27994331 is about 5290.9669248635. The cubic root of 27994331 is about 303.6384024438.

The spelling of 27994331 in words is "twenty-seven million, nine hundred ninety-four thousand, three hundred thirty-one".