27153891 has 6 divisors (see below), whose sum is σ = 39222300. Its totient is φ = 18102588.

The previous prime is 27153887. The next prime is 27153901. The reversal of 27153891 is 19835172.

27153891 is a `hidden beast` number, since 271 + 5 + 389 + 1 = 666.

It is not a de Polignac number, because 27153891 - 2² = 27153887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27153871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1508541 + ... + 1508558.

It is an arithmetic number, because the mean of its divisors is an integer number (6537050).

Almost surely, 2^27153891 is an apocalyptic number.

27153891 is a deficient number, since it is larger than the sum of its proper divisors (12068409).

27153891 is a wasteful number, since it uses less digits than its factorization.

27153891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017105 (or 3017102 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 27153891 is about 5210.9395505993. The cubic root of 27153891 is about 300.5688872093.

The spelling of 27153891 in words is "twenty-seven million, one hundred fifty-three thousand, eight hundred ninety-one".