27421889 has 4 divisors (see below), whose sum is σ = 29914800. Its totient is φ = 24928980.

The previous prime is 27421871. The next prime is 27421897. The reversal of 27421889 is 98812472.

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 a de Polignac number, because none of the positive numbers 2^k-27421889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27441889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246439 + ... + 1246460.

It is an arithmetic number, because the mean of its divisors is an integer number (7478700).

Almost surely, 2^27421889 is an apocalyptic number.

It is an amenable number.

27421889 is a deficient number, since it is larger than the sum of its proper divisors (2492911).

27421889 is a wasteful number, since it uses less digits than its factorization.

27421889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492910.

The product of its digits is 64512, while the sum is 41.

The square root of 27421889 is about 5236.5913531609. The cubic root of 27421889 is about 301.5544832128.

The spelling of 27421889 in words is "twenty-seven million, four hundred twenty-one thousand, eight hundred eighty-nine".