27124813 has 2 divisors, whose sum is σ = 27124814. Its totient is φ = 27124812.

The previous prime is 27124807. The next prime is 27124819. The reversal of 27124813 is 31842172.

It is a balanced prime because it is at equal distance from previous prime (27124807) and next prime (27124819).

It can be written as a sum of positive squares in only one way, i.e., 27060804 + 64009 = 5202^2 + 253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27124813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27124819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13562406 + 13562407.

It is an arithmetic number, because the mean of its divisors is an integer number (13562407).

Almost surely, 2^27124813 is an apocalyptic number.

It is an amenable number.

27124813 is a deficient number, since it is larger than the sum of its proper divisors (1).

27124813 is an equidigital number, since it uses as much as digits as its factorization.

27124813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 27124813 is about 5208.1487113945. The cubic root of 27124813 is about 300.4615598811.

Adding to 27124813 its reverse (31842172), we get a palindrome (58966985).

The spelling of 27124813 in words is "twenty-seven million, one hundred twenty-four thousand, eight hundred thirteen".