27525989 has 4 divisors (see below), whose sum is σ = 27561324. Its totient is φ = 27490656.

The previous prime is 27525947. The next prime is 27525991. The reversal of 27525989 is 98952572.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 18852964 = 2945^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 27525989 - 2²⁰ = 26477413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27525929) 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, 16472 + ... + 18065.

It is an arithmetic number, because the mean of its divisors is an integer number (6890331).

Almost surely, 2^27525989 is an apocalyptic number.

It is an amenable number.

27525989 is a deficient number, since it is larger than the sum of its proper divisors (35335).

27525989 is an equidigital number, since it uses as much as digits as its factorization.

27525989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35334.

The product of its digits is 453600, while the sum is 47.

The square root of 27525989 is about 5246.5216096000. The cubic root of 27525989 is about 301.9355921591.

The spelling of 27525989 in words is "twenty-seven million, five hundred twenty-five thousand, nine hundred eighty-nine".