27613381 has 2 divisors, whose sum is σ = 27613382. Its totient is φ = 27613380.

The previous prime is 27613361. The next prime is 27613429. The reversal of 27613381 is 18331672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17564481 + 10048900 = 4191^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 27613381 - 2⁹ = 27612869 is a prime.

It is a super-2 number, since 2×27613381² = 1524997620502322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27613361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13806690 + 13806691.

It is an arithmetic number, because the mean of its divisors is an integer number (13806691).

Almost surely, 2^27613381 is an apocalyptic number.

It is an amenable number.

27613381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27613381 is an equidigital number, since it uses as much as digits as its factorization.

27613381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 27613381 is about 5254.8435752171. The cubic root of 27613381 is about 302.2547920663.

The spelling of 27613381 in words is "twenty-seven million, six hundred thirteen thousand, three hundred eighty-one".