27902891 has 2 divisors, whose sum is σ = 27902892. Its totient is φ = 27902890.

The previous prime is 27902881. The next prime is 27902911. The reversal of 27902891 is 19820972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27902891 - 2⁶ = 27902827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27902881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13951445 + 13951446.

It is an arithmetic number, because the mean of its divisors is an integer number (13951446).

Almost surely, 2^27902891 is an apocalyptic number.

27902891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27902891 is an equidigital number, since it uses as much as digits as its factorization.

27902891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 27902891 is about 5282.3187143526. The cubic root of 27902891 is about 303.3074428116.

The spelling of 27902891 in words is "twenty-seven million, nine hundred two thousand, eight hundred ninety-one".