1994183939 has 6 divisors (see below), whose sum is σ = 2191954380. Its totient is φ = 1812894380.

The previous prime is 1994183831. The next prime is 1994183951. The reversal of 1994183939 is 9393814991.

It is not a de Polignac number, because 1994183939 - 2¹² = 1994179843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994113939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8240309 + ... + 8240550.

It is an arithmetic number, because the mean of its divisors is an integer number (365325730).

Almost surely, 2^1994183939 is an apocalyptic number.

1994183939 is a deficient number, since it is larger than the sum of its proper divisors (197770441).

1994183939 is a wasteful number, since it uses less digits than its factorization.

1994183939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480881 (or 16480870 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 56.

The square root of 1994183939 is about 44656.2866682845. The cubic root of 1994183939 is about 1258.6985678427.

The spelling of 1994183939 in words is "one billion, nine hundred ninety-four million, one hundred eighty-three thousand, nine hundred thirty-nine".