1994111999 has 16 divisors (see below), whose sum is σ = 2199947904. Its totient is φ = 1792471200.

The previous prime is 1994111989. The next prime is 1994112011. The reversal of 1994111999 is 9991114991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994111999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1994111999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994111939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419852 + ... + 424574.

It is an arithmetic number, because the mean of its divisors is an integer number (137496744).

Almost surely, 2^1994111999 is an apocalyptic number.

1994111999 is a deficient number, since it is larger than the sum of its proper divisors (205835905).

1994111999 is a wasteful number, since it uses less digits than its factorization.

1994111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158.

The product of its digits is 236196, while the sum is 53.

The square root of 1994111999 is about 44655.4811753272. The cubic root of 1994111999 is about 1258.6834318495.

The spelling of 1994111999 in words is "one billion, nine hundred ninety-four million, one hundred eleven thousand, nine hundred ninety-nine".