135325681 has 2 divisors, whose sum is σ = 135325682. Its totient is φ = 135325680.

The previous prime is 135325651. The next prime is 135325691. The reversal of 135325681 is 186523531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128482225 + 6843456 = 11335^2 + 2616^2 .

It is a cyclic number.

It is not a de Polignac number, because 135325681 - 2⁵ = 135325649 is a prime.

It is a super-2 number, since 2×135325681² = 36626079876227522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135325621) 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, 67662840 + 67662841.

It is an arithmetic number, because the mean of its divisors is an integer number (67662841).

Almost surely, 2^135325681 is an apocalyptic number.

It is an amenable number.

135325681 is a deficient number, since it is larger than the sum of its proper divisors (1).

135325681 is an equidigital number, since it uses as much as digits as its factorization.

135325681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 135325681 is about 11632.9566748957. The cubic root of 135325681 is about 513.4049761798.

The spelling of 135325681 in words is "one hundred thirty-five million, three hundred twenty-five thousand, six hundred eighty-one".