27512993 has 4 divisors (see below), whose sum is σ = 27607188. Its totient is φ = 27418800.

The previous prime is 27512981. The next prime is 27513019. The reversal of 27512993 is 39921572.

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 22391824 + 5121169 = 4732^2 + 2263^2 .

It is a cyclic number.

It is not a de Polignac number, because 27512993 - 2¹⁰ = 27511969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27512293) 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, 46658 + ... + 47243.

It is an arithmetic number, because the mean of its divisors is an integer number (6901797).

Almost surely, 2^27512993 is an apocalyptic number.

It is an amenable number.

27512993 is a deficient number, since it is larger than the sum of its proper divisors (94195).

27512993 is an equidigital number, since it uses as much as digits as its factorization.

27512993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94194.

The product of its digits is 34020, while the sum is 38.

The square root of 27512993 is about 5245.2829284987. The cubic root of 27512993 is about 301.8880664957. Note that the first 3 decimals are identical.

The spelling of 27512993 in words is "twenty-seven million, five hundred twelve thousand, nine hundred ninety-three".