27842109 has 4 divisors (see below), whose sum is σ = 37122816. Its totient is φ = 18561404.

The previous prime is 27842081. The next prime is 27842147. The reversal of 27842109 is 90124872.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27842109 - 2⁵ = 27842077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27842109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27842509) 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, 4640349 + ... + 4640354.

It is an arithmetic number, because the mean of its divisors is an integer number (9280704).

Almost surely, 2^27842109 is an apocalyptic number.

It is an amenable number.

27842109 is a deficient number, since it is larger than the sum of its proper divisors (9280707).

27842109 is an equidigital number, since it uses as much as digits as its factorization.

27842109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280706.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 27842109 is about 5276.5622331211. The cubic root of 27842109 is about 303.0870470639.

The spelling of 27842109 in words is "twenty-seven million, eight hundred forty-two thousand, one hundred nine".