135708731 has 8 divisors (see below), whose sum is σ = 143345664. Its totient is φ = 128275560.

The previous prime is 135708721. The next prime is 135708733. The reversal of 135708731 is 137807531.

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 135708731 - 2⁶ = 135708667 is a prime.

It is a super-2 number, since 2×135708731² = 36833719339260722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135708691 and 135708700.

It is not an unprimeable number, because it can be changed into a prime (135708733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49571 + ... + 52236.

It is an arithmetic number, because the mean of its divisors is an integer number (17918208).

Almost surely, 2^135708731 is an apocalyptic number.

135708731 is a deficient number, since it is larger than the sum of its proper divisors (7636933).

135708731 is a wasteful number, since it uses less digits than its factorization.

135708731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101881.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 135708731 is about 11649.4090408055. The cubic root of 135708731 is about 513.8889309184. Note that the first 3 decimals are identical.

The spelling of 135708731 in words is "one hundred thirty-five million, seven hundred eight thousand, seven hundred thirty-one".