135949869 has 24 divisors (see below), whose sum is σ = 214617312. Its totient is φ = 82242720.

The previous prime is 135949861. The next prime is 135949873. The reversal of 135949869 is 968949531.

It is not a de Polignac number, because 135949869 - 2³ = 135949861 is a prime.

It is a super-2 number, since 2×135949869² = 36964733762234322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135949861) 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 in 23 ways as a sum of consecutive naturals, for example, 78042 + ... + 79764.

It is an arithmetic number, because the mean of its divisors is an integer number (8942388).

Almost surely, 2^135949869 is an apocalyptic number.

It is an amenable number.

135949869 is a deficient number, since it is larger than the sum of its proper divisors (78667443).

135949869 is a wasteful number, since it uses less digits than its factorization.

135949869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537 (or 2534 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 135949869 is about 11659.7542426931. The cubic root of 135949869 is about 514.1931236421.

The spelling of 135949869 in words is "one hundred thirty-five million, nine hundred forty-nine thousand, eight hundred sixty-nine".