27697669 has 4 divisors (see below), whose sum is σ = 27717100. Its totient is φ = 27678240.

The previous prime is 27697643. The next prime is 27697679. The reversal of 27697669 is 96679672.

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 9847044 + 17850625 = 3138^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 27697669 - 2⁷ = 27697541 is a prime.

It is a super-2 number, since 2×27697669² = 1534321736067122, 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 (27697619) 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, 7392 + ... + 10489.

It is an arithmetic number, because the mean of its divisors is an integer number (6929275).

Almost surely, 2^27697669 is an apocalyptic number.

It is an amenable number.

27697669 is a deficient number, since it is larger than the sum of its proper divisors (19431).

27697669 is a wasteful number, since it uses less digits than its factorization.

27697669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430.

The product of its digits is 1714608, while the sum is 52.

The square root of 27697669 is about 5262.8574937956. The cubic root of 27697669 is about 302.5620172006.

The spelling of 27697669 in words is "twenty-seven million, six hundred ninety-seven thousand, six hundred sixty-nine".