27146981 has 2 divisors, whose sum is σ = 27146982. Its totient is φ = 27146980.

The previous prime is 27146957. The next prime is 27147031. The reversal of 27146981 is 18964172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 6806881 = 4510^2 + 2609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27146981 is a prime.

It is a super-2 number, since 2×27146981² = 1473917154828722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27146381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13573490 + 13573491.

It is an arithmetic number, because the mean of its divisors is an integer number (13573491).

Almost surely, 2^27146981 is an apocalyptic number.

It is an amenable number.

27146981 is a deficient number, since it is larger than the sum of its proper divisors (1).

27146981 is an equidigital number, since it uses as much as digits as its factorization.

27146981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 27146981 is about 5210.2764801880. The cubic root of 27146981 is about 300.5433892403.

The spelling of 27146981 in words is "twenty-seven million, one hundred forty-six thousand, nine hundred eighty-one".