134991899 has 8 divisors (see below), whose sum is σ = 160984320. Its totient is φ = 110676456.

The previous prime is 134991889. The next prime is 134991953. The reversal of 134991899 is 998199431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134991899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 134991899.

It is not an unprimeable number, because it can be changed into a prime (134991809) 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 7 ways as a sum of consecutive naturals, for example, 419069 + ... + 419390.

It is an arithmetic number, because the mean of its divisors is an integer number (20123040).

Almost surely, 2^134991899 is an apocalyptic number.

134991899 is a deficient number, since it is larger than the sum of its proper divisors (25992421).

134991899 is an equidigital number, since it uses as much as digits as its factorization.

134991899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838489.

The product of its digits is 629856, while the sum is 53.

The square root of 134991899 is about 11618.6014218580. The cubic root of 134991899 is about 512.9825226754.

The spelling of 134991899 in words is "one hundred thirty-four million, nine hundred ninety-one thousand, eight hundred ninety-nine".