135485729 has 2 divisors, whose sum is σ = 135485730. Its totient is φ = 135485728.

The previous prime is 135485719. The next prime is 135485747. The reversal of 135485729 is 927584531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80013025 + 55472704 = 8945^2 + 7448^2 .

It is an emirp because it is prime and its reverse (927584531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135485729 - 2⁸ = 135485473 is a prime.

It is a super-2 number, since 2×135485729² = 36712765525322882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135485729.

It is not a weakly prime, because it can be changed into another prime (135485719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67742864 + 67742865.

It is an arithmetic number, because the mean of its divisors is an integer number (67742865).

Almost surely, 2^135485729 is an apocalyptic number.

It is an amenable number.

135485729 is a deficient number, since it is larger than the sum of its proper divisors (1).

135485729 is an equidigital number, since it uses as much as digits as its factorization.

135485729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 135485729 is about 11639.8337187436. The cubic root of 135485729 is about 513.6072956674.

The spelling of 135485729 in words is "one hundred thirty-five million, four hundred eighty-five thousand, seven hundred twenty-nine".