27140981 has 4 divisors (see below), whose sum is σ = 31018272. Its totient is φ = 23263692.

The previous prime is 27140977. The next prime is 27140983. The reversal of 27140981 is 18904172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27140981 - 2² = 27140977 is a prime.

It is a super-2 number, since 2×27140981² = 1473265699284722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27140983) 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, 1938635 + ... + 1938648.

It is an arithmetic number, because the mean of its divisors is an integer number (7754568).

Almost surely, 2^27140981 is an apocalyptic number.

It is an amenable number.

27140981 is a deficient number, since it is larger than the sum of its proper divisors (3877291).

27140981 is an equidigital number, since it uses as much as digits as its factorization.

27140981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877290.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 27140981 is about 5209.7006631859. The cubic root of 27140981 is about 300.5212456705.

The spelling of 27140981 in words is "twenty-seven million, one hundred forty thousand, nine hundred eighty-one".