135949531 has 4 divisors (see below), whose sum is σ = 139111192. Its totient is φ = 132787872.

The previous prime is 135949483. The next prime is 135949543.

135949531 is nontrivially palindromic in base 10.

135949531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 135949531 - 2⁹ = 135949019 is a prime.

It is a super-2 number, since 2×135949531² = 36964549958239922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135949591) 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, 1580766 + ... + 1580851.

It is an arithmetic number, because the mean of its divisors is an integer number (34777798).

Almost surely, 2^135949531 is an apocalyptic number.

135949531 is a deficient number, since it is larger than the sum of its proper divisors (3161661).

135949531 is an equidigital number, since it uses as much as digits as its factorization.

135949531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161660.

The product of its digits is 72900, while the sum is 40.

The square root of 135949531 is about 11659.7397483820. The cubic root of 135949531 is about 514.1926975109.

The spelling of 135949531 in words is "one hundred thirty-five million, nine hundred forty-nine thousand, five hundred thirty-one".