1999429135 has 8 divisors (see below), whose sum is σ = 2617434576. Its totient is φ = 1454130240.

The previous prime is 1999429129. The next prime is 1999429139. The reversal of 1999429135 is 5319249991.

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

It is a de Polignac number, because none of the positive numbers 2^k-1999429135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999429139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18176574 + ... + 18176683.

It is an arithmetic number, because the mean of its divisors is an integer number (327179322).

Almost surely, 2^1999429135 is an apocalyptic number.

1999429135 is a deficient number, since it is larger than the sum of its proper divisors (618005441).

1999429135 is a wasteful number, since it uses less digits than its factorization.

1999429135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36353273.

The product of its digits is 787320, while the sum is 52.

The square root of 1999429135 is about 44714.9766297602. The cubic root of 1999429135 is about 1259.8011643494.

It can be divided in two parts, 1999 and 429135, that added together give a palindrome (431134).

The spelling of 1999429135 in words is "one billion, nine hundred ninety-nine million, four hundred twenty-nine thousand, one hundred thirty-five".