27021139 has 4 divisors (see below), whose sum is σ = 27121120. Its totient is φ = 26921160.

The previous prime is 27021131. The next prime is 27021179. The reversal of 27021139 is 93112072.

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 27021139 - 2³ = 27021131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27021131) 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, 49584 + ... + 50125.

It is an arithmetic number, because the mean of its divisors is an integer number (6780280).

Almost surely, 2^27021139 is an apocalyptic number.

27021139 is a deficient number, since it is larger than the sum of its proper divisors (99981).

27021139 is an equidigital number, since it uses as much as digits as its factorization.

27021139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99980.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 27021139 is about 5198.1861259482. The cubic root of 27021139 is about 300.0782721690.

The spelling of 27021139 in words is "twenty-seven million, twenty-one thousand, one hundred thirty-nine".