27904691 has 2 divisors, whose sum is σ = 27904692. Its totient is φ = 27904690.

The previous prime is 27904687. The next prime is 27904693. The reversal of 27904691 is 19640972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27904691 - 2² = 27904687 is a prime.

Together with 27904693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27904693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13952345 + 13952346.

It is an arithmetic number, because the mean of its divisors is an integer number (13952346).

Almost surely, 2^27904691 is an apocalyptic number.

27904691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27904691 is an equidigital number, since it uses as much as digits as its factorization.

27904691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 27904691 is about 5282.4890913281. The cubic root of 27904691 is about 303.3139647363.

The spelling of 27904691 in words is "twenty-seven million, nine hundred four thousand, six hundred ninety-one".