27370981 has 4 divisors (see below), whose sum is σ = 29859264. Its totient is φ = 24882700.

The previous prime is 27370961. The next prime is 27370991. The reversal of 27370981 is 18907372.

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 a de Polignac number, because none of the positive numbers 2^k-27370981 is a prime.

It is a super-2 number, since 2×27370981² = 1498341201804722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27370981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27370951) 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, 1244125 + ... + 1244146.

It is an arithmetic number, because the mean of its divisors is an integer number (7464816).

Almost surely, 2^27370981 is an apocalyptic number.

It is an amenable number.

27370981 is a deficient number, since it is larger than the sum of its proper divisors (2488283).

27370981 is a wasteful number, since it uses less digits than its factorization.

27370981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488282.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 27370981 is about 5231.7282995201. The cubic root of 27370981 is about 301.3677583505.

The spelling of 27370981 in words is "twenty-seven million, three hundred seventy thousand, nine hundred eighty-one".