1999641134 has 16 divisors (see below), whose sum is σ = 3058401888. Its totient is φ = 980202912.

The previous prime is 1999641109. The next prime is 1999641139. The reversal of 1999641134 is 4311469991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999641139) 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, 146864 + ... + 159900.

It is an arithmetic number, because the mean of its divisors is an integer number (191150118).

Almost surely, 2^1999641134 is an apocalyptic number.

1999641134 is a deficient number, since it is larger than the sum of its proper divisors (1058760754).

1999641134 is a wasteful number, since it uses less digits than its factorization.

1999641134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14539.

The product of its digits is 209952, while the sum is 47.

The square root of 1999641134 is about 44717.3471261433. The cubic root of 1999641134 is about 1259.8456882493.

The spelling of 1999641134 in words is "one billion, nine hundred ninety-nine million, six hundred forty-one thousand, one hundred thirty-four".