27993371 has 4 divisors (see below), whose sum is σ = 31992432. Its totient is φ = 23994312.

The previous prime is 27993367. The next prime is 27993379. The reversal of 27993371 is 17339972.

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 27993371 - 2² = 27993367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27993379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999520 + ... + 1999533.

It is an arithmetic number, because the mean of its divisors is an integer number (7998108).

Almost surely, 2^27993371 is an apocalyptic number.

27993371 is a deficient number, since it is larger than the sum of its proper divisors (3999061).

27993371 is an equidigital number, since it uses as much as digits as its factorization.

27993371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999060.

The product of its digits is 71442, while the sum is 41.

The square root of 27993371 is about 5290.8762034279. The cubic root of 27993371 is about 303.6349315482.

It can be divided in two parts, 27993 and 371, that multiplied together give a triangular number (10385403 = T₄₅₅₇).

The spelling of 27993371 in words is "twenty-seven million, nine hundred ninety-three thousand, three hundred seventy-one".