27730091 has 4 divisors (see below), whose sum is σ = 27746784. Its totient is φ = 27713400.

The previous prime is 27730081. The next prime is 27730097. The reversal of 27730091 is 19003772.

It is a happy number.

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 27730091 - 2¹⁰ = 27729067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27730097) 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, 5540 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (6936696).

Almost surely, 2^27730091 is an apocalyptic number.

27730091 is a deficient number, since it is larger than the sum of its proper divisors (16693).

27730091 is a wasteful number, since it uses less digits than its factorization.

27730091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 27730091 is about 5265.9368587175. The cubic root of 27730091 is about 302.6800276198.

The spelling of 27730091 in words is "twenty-seven million, seven hundred thirty thousand, ninety-one".