135091908 has 48 divisors (see below), whose sum is σ = 400274560. Its totient is φ = 38597472.

The previous prime is 135091907. The next prime is 135091927. The reversal of 135091908 is 809190531.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135091907) 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 15 ways as a sum of consecutive naturals, for example, 88591 + ... + 90102.

Almost surely, 2^135091908 is an apocalyptic number.

135091908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135091908 is an abundant number, since it is smaller than the sum of its proper divisors (265182652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135091908 is a wasteful number, since it uses less digits than its factorization.

135091908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178713 (or 178705 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 135091908 is about 11622.9044562880. The cubic root of 135091908 is about 513.1091727570.

The spelling of 135091908 in words is "one hundred thirty-five million, ninety-one thousand, nine hundred eight".