135131949 has 16 divisors (see below), whose sum is σ = 202732800. Its totient is φ = 88946208.

The previous prime is 135131921. The next prime is 135131951. The reversal of 135131949 is 949131531.

135131949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135131949 - 2¹¹ = 135129901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135131959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29544 + ... + 33809.

It is an arithmetic number, because the mean of its divisors is an integer number (12670800).

Almost surely, 2^135131949 is an apocalyptic number.

It is an amenable number.

135131949 is a deficient number, since it is larger than the sum of its proper divisors (67600851).

135131949 is an equidigital number, since it uses as much as digits as its factorization.

135131949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63441 (or 63435 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 135131949 is about 11624.6268327203. The cubic root of 135131949 is about 513.1598626296.

The spelling of 135131949 in words is "one hundred thirty-five million, one hundred thirty-one thousand, nine hundred forty-nine".