135131976 has 160 divisors (see below), whose sum is σ = 446983680. Its totient is φ = 37363680.

The previous prime is 135131959. The next prime is 135131981. The reversal of 135131976 is 679131531.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 135131976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4359081 + ... + 4359111.

It is an arithmetic number, because the mean of its divisors is an integer number (2793648).

Almost surely, 2^135131976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135131976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223491840).

135131976 is an abundant number, since it is smaller than the sum of its proper divisors (311851704).

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

135131976 is an frugal number, since it uses more digits than its factorization.

135131976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 43 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 135131976 is about 11624.6279940478. The cubic root of 135131976 is about 513.1598968069.

The spelling of 135131976 in words is "one hundred thirty-five million, one hundred thirty-one thousand, nine hundred seventy-six".