135944731 has 4 divisors (see below), whose sum is σ = 146402032. Its totient is φ = 125487432.

The previous prime is 135944723. The next prime is 135944747. The reversal of 135944731 is 137449531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135944731 - 2³ = 135944723 is a prime.

It is a super-2 number, since 2×135944731² = 36961939773324722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135944231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5228631 + ... + 5228656.

It is an arithmetic number, because the mean of its divisors is an integer number (36600508).

Almost surely, 2^135944731 is an apocalyptic number.

135944731 is a deficient number, since it is larger than the sum of its proper divisors (10457301).

135944731 is a wasteful number, since it uses less digits than its factorization.

135944731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10457300.

The product of its digits is 45360, while the sum is 37.

The square root of 135944731 is about 11659.5339100669. The cubic root of 135944731 is about 514.1866458681.

The spelling of 135944731 in words is "one hundred thirty-five million, nine hundred forty-four thousand, seven hundred thirty-one".