27181013 has 2 divisors, whose sum is σ = 27181014. Its totient is φ = 27181012.

The previous prime is 27180973. The next prime is 27181061. The reversal of 27181013 is 31018172.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25170289 + 2010724 = 5017^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 27181013 - 2¹² = 27176917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27181013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27181093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13590506 + 13590507.

It is an arithmetic number, because the mean of its divisors is an integer number (13590507).

Almost surely, 2^27181013 is an apocalyptic number.

It is an amenable number.

27181013 is a deficient number, since it is larger than the sum of its proper divisors (1).

27181013 is an equidigital number, since it uses as much as digits as its factorization.

27181013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 27181013 is about 5213.5413108558. The cubic root of 27181013 is about 300.6689258705.

Adding to 27181013 its reverse (31018172), we get a palindrome (58199185).

The spelling of 27181013 in words is "twenty-seven million, one hundred eighty-one thousand, thirteen".