135441569 has 2 divisors, whose sum is σ = 135441570. Its totient is φ = 135441568.

The previous prime is 135441487. The next prime is 135441583. The reversal of 135441569 is 965144531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127961344 + 7480225 = 11312^2 + 2735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135441569 is a prime.

It is a super-2 number, since 2×135441569² = 36688837226363522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135441599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67720784 + 67720785.

It is an arithmetic number, because the mean of its divisors is an integer number (67720785).

Almost surely, 2^135441569 is an apocalyptic number.

It is an amenable number.

135441569 is a deficient number, since it is larger than the sum of its proper divisors (1).

135441569 is an equidigital number, since it uses as much as digits as its factorization.

135441569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 135441569 is about 11637.9366298326. The cubic root of 135441569 is about 513.5514881591.

The spelling of 135441569 in words is "one hundred thirty-five million, four hundred forty-one thousand, five hundred sixty-nine".