135502369 has 4 divisors (see below), whose sum is σ = 136745620. Its totient is φ = 134259120.

The previous prime is 135502337. The next prime is 135502373. The reversal of 135502369 is 963205531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963205531 = 683 ⋅1410257.

It can be written as a sum of positive squares in 2 ways, for example, as 95648400 + 39853969 = 9780^2 + 6313^2 .

It is a cyclic number.

It is not a de Polignac number, because 135502369 - 2⁵ = 135502337 is a prime.

It is a super-2 number, since 2×135502369² = 36721784009224322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135502309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621462 + ... + 621679.

It is an arithmetic number, because the mean of its divisors is an integer number (34186405).

Almost surely, 2^135502369 is an apocalyptic number.

It is an amenable number.

135502369 is a deficient number, since it is larger than the sum of its proper divisors (1243251).

135502369 is a wasteful number, since it uses less digits than its factorization.

135502369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243250.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 135502369 is about 11640.5484836411. The cubic root of 135502369 is about 513.6283214379.

The spelling of 135502369 in words is "one hundred thirty-five million, five hundred two thousand, three hundred sixty-nine".