1994183938 has 4 divisors (see below), whose sum is σ = 2991275910. Its totient is φ = 997091968.

The previous prime is 1994183831. The next prime is 1994183951. The reversal of 1994183938 is 8393814991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1167793929 + 826390009 = 34173^2 + 28747^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498545983 + ... + 498545986.

Almost surely, 2^1994183938 is an apocalyptic number.

1994183938 is a deficient number, since it is larger than the sum of its proper divisors (997091972).

1994183938 is an equidigital number, since it uses as much as digits as its factorization.

1994183938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997091971.

The product of its digits is 1679616, while the sum is 55.

The square root of 1994183938 is about 44656.2866570878. The cubic root of 1994183938 is about 1258.6985676323.

The spelling of 1994183938 in words is "one billion, nine hundred ninety-four million, one hundred eighty-three thousand, nine hundred thirty-eight".