27434989 has 4 divisors (see below), whose sum is σ = 28073056. Its totient is φ = 26796924.

The previous prime is 27434987. The next prime is 27434999. The reversal of 27434989 is 98943472.

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 27434989 - 2¹ = 27434987 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27434983) 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, 318969 + ... + 319054.

It is an arithmetic number, because the mean of its divisors is an integer number (7018264).

Almost surely, 2^27434989 is an apocalyptic number.

It is an amenable number.

27434989 is a deficient number, since it is larger than the sum of its proper divisors (638067).

27434989 is an equidigital number, since it uses as much as digits as its factorization.

27434989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638066.

The product of its digits is 435456, while the sum is 46.

The square root of 27434989 is about 5237.8420174725. The cubic root of 27434989 is about 301.6024951598.

The spelling of 27434989 in words is "twenty-seven million, four hundred thirty-four thousand, nine hundred eighty-nine".