1994012289 has 16 divisors (see below), whose sum is σ = 2959761600. Its totient is φ = 1326790368.

The previous prime is 1994012281. The next prime is 1994012311. The reversal of 1994012289 is 9822104991.

1994012289 is a `hidden beast` number, since 19 + 9 + 401 + 228 + 9 = 666.

It is not a de Polignac number, because 1994012289 - 2³ = 1994012281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994012281) 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, 56484 + ... + 84725.

It is an arithmetic number, because the mean of its divisors is an integer number (184985100).

Almost surely, 2^1994012289 is an apocalyptic number.

It is an amenable number.

1994012289 is a deficient number, since it is larger than the sum of its proper divisors (965749311).

1994012289 is a wasteful number, since it uses less digits than its factorization.

1994012289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141741 (or 141735 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1994012289 is about 44654.3647250747. The cubic root of 1994012289 is about 1258.6624525168.

The spelling of 1994012289 in words is "one billion, nine hundred ninety-four million, twelve thousand, two hundred eighty-nine".