27097561 has 4 divisors (see below), whose sum is σ = 27197824. Its totient is φ = 26997300.

The previous prime is 27097559. The next prime is 27097583. The reversal of 27097561 is 16579072.

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 27097561 - 2¹ = 27097559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27097561.

It is not an unprimeable number, because it can be changed into a prime (27097501) 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, 49725 + ... + 50266.

It is an arithmetic number, because the mean of its divisors is an integer number (6799456).

Almost surely, 2^27097561 is an apocalyptic number.

It is an amenable number.

27097561 is a deficient number, since it is larger than the sum of its proper divisors (100263).

27097561 is an equidigital number, since it uses as much as digits as its factorization.

27097561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100262.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 27097561 is about 5205.5317691855. The cubic root of 27097561 is about 300.3609026938.

The spelling of 27097561 in words is "twenty-seven million, ninety-seven thousand, five hundred sixty-one".