27316991 has 6 divisors (see below), whose sum is σ = 29580120. Its totient is φ = 25215528.

The previous prime is 27316981. The next prime is 27317023. The reversal of 27316991 is 19961372.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-27316991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27316931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80651 + ... + 80988.

It is an arithmetic number, because the mean of its divisors is an integer number (4930020).

Almost surely, 2^27316991 is an apocalyptic number.

27316991 is a deficient number, since it is larger than the sum of its proper divisors (2263129).

27316991 is a wasteful number, since it uses less digits than its factorization.

27316991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161665 (or 161652 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 27316991 is about 5226.5658897597. The cubic root of 27316991 is about 301.1694759038.

The spelling of 27316991 in words is "twenty-seven million, three hundred sixteen thousand, nine hundred ninety-one".