27122891 has 2 divisors, whose sum is σ = 27122892. Its totient is φ = 27122890.

The previous prime is 27122881. The next prime is 27122897. The reversal of 27122891 is 19822172.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27122891 - 2⁶ = 27122827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27122897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13561445 + 13561446.

It is an arithmetic number, because the mean of its divisors is an integer number (13561446).

Almost surely, 2^27122891 is an apocalyptic number.

27122891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27122891 is an equidigital number, since it uses as much as digits as its factorization.

27122891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 27122891 is about 5207.9641895850. The cubic root of 27122891 is about 300.4544630487.

The spelling of 27122891 in words is "twenty-seven million, one hundred twenty-two thousand, eight hundred ninety-one".