135969894 has 32 divisors (see below), whose sum is σ = 310326240. Its totient is φ = 44097696.

The previous prime is 135969881. The next prime is 135969923. The reversal of 135969894 is 498969531.

135969894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 135969894.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32029 + ... + 36024.

It is an arithmetic number, because the mean of its divisors is an integer number (9697695).

Almost surely, 2^135969894 is an apocalyptic number.

135969894 is an abundant number, since it is smaller than the sum of its proper divisors (174356346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135969894 is a wasteful number, since it uses less digits than its factorization.

135969894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68101 (or 68095 counting only the distinct ones).

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

The square root of 135969894 is about 11660.6129341472. The cubic root of 135969894 is about 514.2183687609.

It can be divided in two parts, 1359 and 69894, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 135969894 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, eight hundred ninety-four".