27135397 has 2 divisors, whose sum is σ = 27135398. Its totient is φ = 27135396.

The previous prime is 27135389. The next prime is 27135421. The reversal of 27135397 is 79353172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22268961 + 4866436 = 4719^2 + 2206^2 .

It is a cyclic number.

It is not a de Polignac number, because 27135397 - 2³ = 27135389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27135337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13567698 + 13567699.

It is an arithmetic number, because the mean of its divisors is an integer number (13567699).

Almost surely, 2^27135397 is an apocalyptic number.

It is an amenable number.

27135397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27135397 is an equidigital number, since it uses as much as digits as its factorization.

27135397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 27135397 is about 5209.1647123123. The cubic root of 27135397 is about 300.5006344561.

It can be divided in two parts, 27 and 135397, that added together give a square (135424 = 368²).

The spelling of 27135397 in words is "twenty-seven million, one hundred thirty-five thousand, three hundred ninety-seven".