135996 has 24 divisors (see below), whose sum is σ = 362880. Its totient is φ = 38832.

The previous prime is 135979. The next prime is 136013. The reversal of 135996 is 699531.

It is an interprime number because it is at equal distance from previous prime (135979) and next prime (136013).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135996.

It is an unprimeable number.

135996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2¹³⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

135996 is an abundant number, since it is smaller than the sum of its proper divisors (226884).

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

135996 is a wasteful number, since it uses less digits than its factorization.

135996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its digits is 7290, while the sum is 33.

The square root of 135996 is about 368.7763549904. The cubic root of 135996 is about 51.4251276354.

The spelling of 135996 in words is "one hundred thirty-five thousand, nine hundred ninety-six".