135660031 has 4 divisors (see below), whose sum is σ = 146095432. Its totient is φ = 125224632.

The previous prime is 135659989. The next prime is 135660067. The reversal of 135660031 is 130066531.

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

It is not a de Polignac number, because 135660031 - 2⁷ = 135659903 is a prime.

It is a super-2 number, since 2×135660031² = 36807288021841922, 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 = 135659978 and 135660005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135660071) 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 3 ways as a sum of consecutive naturals, for example, 5217681 + ... + 5217706.

It is an arithmetic number, because the mean of its divisors is an integer number (36523858).

Almost surely, 2^135660031 is an apocalyptic number.

135660031 is a deficient number, since it is larger than the sum of its proper divisors (10435401).

135660031 is a wasteful number, since it uses less digits than its factorization.

135660031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10435400.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 135660031 is about 11647.3186184632. The cubic root of 135660031 is about 513.8274527192.

The spelling of 135660031 in words is "one hundred thirty-five million, six hundred sixty thousand, thirty-one".