27361381 has 4 divisors (see below), whose sum is σ = 28970892. Its totient is φ = 25751872.

The previous prime is 27361363. The next prime is 27361429. The reversal of 27361381 is 18316372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9796900 + 17564481 = 3130^2 + 4191^2 .

It is not a de Polignac number, because 27361381 - 2⁷ = 27361253 is a prime.

It is a super-2 number, since 2×27361381² = 1497290340454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27361361) 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, 804730 + ... + 804763.

It is an arithmetic number, because the mean of its divisors is an integer number (7242723).

Almost surely, 2^27361381 is an apocalyptic number.

It is an amenable number.

27361381 is a deficient number, since it is larger than the sum of its proper divisors (1609511).

27361381 is a wasteful number, since it uses less digits than its factorization.

27361381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609510.

The product of its digits is 6048, while the sum is 31.

The square root of 27361381 is about 5230.8107402199. The cubic root of 27361381 is about 301.3325206805.

The spelling of 27361381 in words is "twenty-seven million, three hundred sixty-one thousand, three hundred eighty-one".