27791969 has 4 divisors (see below), whose sum is σ = 28126896. Its totient is φ = 27457044.

The previous prime is 27791873. The next prime is 27791977. The reversal of 27791969 is 96919772.

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 27791969 - 2⁸ = 27791713 is a prime.

It is a super-2 number, since 2×27791969² = 1544787081793922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27791069) 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, 167339 + ... + 167504.

It is an arithmetic number, because the mean of its divisors is an integer number (7031724).

Almost surely, 2^27791969 is an apocalyptic number.

It is an amenable number.

27791969 is a deficient number, since it is larger than the sum of its proper divisors (334927).

27791969 is an equidigital number, since it uses as much as digits as its factorization.

27791969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334926.

The product of its digits is 428652, while the sum is 50.

The square root of 27791969 is about 5271.8088925909. The cubic root of 27791969 is about 302.9049976826.

The spelling of 27791969 in words is "twenty-seven million, seven hundred ninety-one thousand, nine hundred sixty-nine".