27416381 has 2 divisors, whose sum is σ = 27416382. Its totient is φ = 27416380.

The previous prime is 27416357. The next prime is 27416383. The reversal of 27416381 is 18361472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 8797156 = 4315^2 + 2966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27416381 is a prime.

It is a super-2 number, since 2×27416381² = 1503315894274322, which contains 22 as substring.

Together with 27416383, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27416383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13708190 + 13708191.

It is an arithmetic number, because the mean of its divisors is an integer number (13708191).

Almost surely, 2^27416381 is an apocalyptic number.

It is an amenable number.

27416381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27416381 is an equidigital number, since it uses as much as digits as its factorization.

27416381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 27416381 is about 5236.0654121201. The cubic root of 27416381 is about 301.5342916387.

The spelling of 27416381 in words is "twenty-seven million, four hundred sixteen thousand, three hundred eighty-one".