27797491 has 4 divisors (see below), whose sum is σ = 27887184. Its totient is φ = 27707800.

The previous prime is 27797489. The next prime is 27797509. The reversal of 27797491 is 19479772.

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

It is a cyclic number.

It is not a de Polignac number, because 27797491 - 2¹ = 27797489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27797411) 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, 44380 + ... + 45001.

It is an arithmetic number, because the mean of its divisors is an integer number (6971796).

Almost surely, 2^27797491 is an apocalyptic number.

27797491 is a deficient number, since it is larger than the sum of its proper divisors (89693).

27797491 is an equidigital number, since it uses as much as digits as its factorization.

27797491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89692.

The product of its digits is 222264, while the sum is 46.

The square root of 27797491 is about 5272.3325957303. The cubic root of 27797491 is about 302.9250578018.

The spelling of 27797491 in words is "twenty-seven million, seven hundred ninety-seven thousand, four hundred ninety-one".