27690869 has 4 divisors (see below), whose sum is σ = 27732096. Its totient is φ = 27649644.

The previous prime is 27690863. The next prime is 27690893. The reversal of 27690869 is 96809672.

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 27690869 - 2²⁰ = 26642293 is a prime.

It is a super-2 number, since 2×27690869² = 1533568451950322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27690863) 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, 19589 + ... + 20954.

It is an arithmetic number, because the mean of its divisors is an integer number (6933024).

Almost surely, 2^27690869 is an apocalyptic number.

It is an amenable number.

27690869 is a deficient number, since it is larger than the sum of its proper divisors (41227).

27690869 is an equidigital number, since it uses as much as digits as its factorization.

27690869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41226.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 27690869 is about 5262.2114172656. The cubic root of 27690869 is about 302.5372547063.

The spelling of 27690869 in words is "twenty-seven million, six hundred ninety thousand, eight hundred sixty-nine".