27120091 has 4 divisors (see below), whose sum is σ = 27178632. Its totient is φ = 27061552.

The previous prime is 27120043. The next prime is 27120097. The reversal of 27120091 is 19002172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27120091 - 2¹⁵ = 27087323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27120097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28570 + ... + 29503.

It is an arithmetic number, because the mean of its divisors is an integer number (6794658).

Almost surely, 2^27120091 is an apocalyptic number.

27120091 is a deficient number, since it is larger than the sum of its proper divisors (58541).

27120091 is an equidigital number, since it uses as much as digits as its factorization.

27120091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58540.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 27120091 is about 5207.6953635941. The cubic root of 27120091 is about 300.4441236709. Note that the first 3 decimals are identical.

The spelling of 27120091 in words is "twenty-seven million, one hundred twenty thousand, ninety-one".