27068991 has 4 divisors (see below), whose sum is σ = 36091992. Its totient is φ = 18045992.

The previous prime is 27068989. The next prime is 27069001. The reversal of 27068991 is 19986072.

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 27068991 - 2¹ = 27068989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27068971) 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, 4511496 + ... + 4511501.

It is an arithmetic number, because the mean of its divisors is an integer number (9022998).

Almost surely, 2^27068991 is an apocalyptic number.

27068991 is a deficient number, since it is larger than the sum of its proper divisors (9023001).

27068991 is an equidigital number, since it uses as much as digits as its factorization.

27068991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023000.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 27068991 is about 5202.7868493722. The cubic root of 27068991 is about 300.2553048920.

The spelling of 27068991 in words is "twenty-seven million, sixty-eight thousand, nine hundred ninety-one".