27475891 has 2 divisors, whose sum is σ = 27475892. Its totient is φ = 27475890.

The previous prime is 27475879. The next prime is 27475897. The reversal of 27475891 is 19857472.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27475891 is a prime.

It is not a weakly prime, because it can be changed into another prime (27475897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13737945 + 13737946.

It is an arithmetic number, because the mean of its divisors is an integer number (13737946).

Almost surely, 2^27475891 is an apocalyptic number.

27475891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27475891 is an equidigital number, since it uses as much as digits as its factorization.

27475891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 27475891 is about 5241.7450338604. The cubic root of 27475891 is about 301.7523040990.

The spelling of 27475891 in words is "twenty-seven million, four hundred seventy-five thousand, eight hundred ninety-one".