27690131 has 4 divisors (see below), whose sum is σ = 31645872. Its totient is φ = 23734392.

The previous prime is 27690107. The next prime is 27690139. The reversal of 27690131 is 13109672.

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 27690131 - 2⁶ = 27690067 is a prime.

It is a super-2 number, since 2×27690131² = 1533486709594322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27690094 and 27690103.

It is not an unprimeable number, because it can be changed into a prime (27690139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977860 + ... + 1977873.

It is an arithmetic number, because the mean of its divisors is an integer number (7911468).

Almost surely, 2^27690131 is an apocalyptic number.

27690131 is a deficient number, since it is larger than the sum of its proper divisors (3955741).

27690131 is an equidigital number, since it uses as much as digits as its factorization.

27690131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955740.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 27690131 is about 5262.1412941881. The cubic root of 27690131 is about 302.5345670036.

The spelling of 27690131 in words is "twenty-seven million, six hundred ninety thousand, one hundred thirty-one".