134991688 has 32 divisors (see below), whose sum is σ = 279954360. Its totient is φ = 60618240.

The previous prime is 134991683. The next prime is 134991691. The reversal of 134991688 is 886199431.

It can be written as a sum of positive squares in 4 ways, for example, as 131744484 + 3247204 = 11478^2 + 1802^2 .

It is not an unprimeable number, because it can be changed into a prime (134991683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13693 + ... + 21388.

Almost surely, 2^134991688 is an apocalyptic number.

It is an amenable number.

134991688 is an abundant number, since it is smaller than the sum of its proper divisors (144962672).

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

134991688 is a wasteful number, since it uses less digits than its factorization.

134991688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35137 (or 35133 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 134991688 is about 11618.5923415877. The cubic root of 134991688 is about 512.9822554017.

The spelling of 134991688 in words is "one hundred thirty-four million, nine hundred ninety-one thousand, six hundred eighty-eight".