135809874 has 12 divisors (see below), whose sum is σ = 294254766. Its totient is φ = 45269952.

The previous prime is 135809801. The next prime is 135809879. The reversal of 135809874 is 478908531.

It can be written as a sum of positive squares in only one way, i.e., 79334649 + 56475225 = 8907^2 + 7515^2 .

It is not an unprimeable number, because it can be changed into a prime (135809879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3772479 + ... + 3772514.

Almost surely, 2^135809874 is an apocalyptic number.

135809874 is an abundant number, since it is smaller than the sum of its proper divisors (158444892).

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

135809874 is a wasteful number, since it uses less digits than its factorization.

135809874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545001 (or 7544998 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 135809874 is about 11653.7493537488. The cubic root of 135809874 is about 514.0165654500.

The spelling of 135809874 in words is "one hundred thirty-five million, eight hundred nine thousand, eight hundred seventy-four".