135683731 has 8 divisors (see below), whose sum is σ = 142995600. Its totient is φ = 128388960.

The previous prime is 135683711. The next prime is 135683813. The reversal of 135683731 is 137386531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135683731 - 2¹⁹ = 135159443 is a prime.

It is a super-2 number, since 2×135683731² = 36820149716160722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135683701) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14085 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (17874450).

Almost surely, 2^135683731 is an apocalyptic number.

135683731 is a deficient number, since it is larger than the sum of its proper divisors (7311869).

135683731 is an equidigital number, since it uses as much as digits as its factorization.

135683731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8549.

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

The square root of 135683731 is about 11648.3359755804. The cubic root of 135683731 is about 513.8573731054.

The spelling of 135683731 in words is "one hundred thirty-five million, six hundred eighty-three thousand, seven hundred thirty-one".