27359981 has 16 divisors (see below), whose sum is σ = 31732800. Its totient is φ = 23328000.

The previous prime is 27359977. The next prime is 27359999. The reversal of 27359981 is 18995372.

It is a cyclic number.

It is not a de Polignac number, because 27359981 - 2² = 27359977 is a prime.

It is a super-2 number, since 2×27359981² = 1497137120640722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27359281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22181 + ... + 23381.

It is an arithmetic number, because the mean of its divisors is an integer number (1983300).

Almost surely, 2^27359981 is an apocalyptic number.

It is an amenable number.

27359981 is a deficient number, since it is larger than the sum of its proper divisors (4372819).

27359981 is a wasteful number, since it uses less digits than its factorization.

27359981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340.

The product of its digits is 136080, while the sum is 44.

The square root of 27359981 is about 5230.6769160406. The cubic root of 27359981 is about 301.3273811650.

The spelling of 27359981 in words is "twenty-seven million, three hundred fifty-nine thousand, nine hundred eighty-one".