2001938 has 4 divisors (see below), whose sum is σ = 3002910. Its totient is φ = 1000968.

The previous prime is 2001919. The next prime is 2001953. The reversal of 2001938 is 8391002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8391002 = 2 ⋅4195501.

It can be written as a sum of positive squares in only one way, i.e., 1787569 + 214369 = 1337^2 + 463^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500483 + ... + 500486.

2^2001938 is an apocalyptic number.

2001938 is a deficient number, since it is larger than the sum of its proper divisors (1000972).

2001938 is a wasteful number, since it uses less digits than its factorization.

2001938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000971.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2001938 is about 1414.8985829380. The cubic root of 2001938 is about 126.0327873018.

The spelling of 2001938 in words is "two million, one thousand, nine hundred thirty-eight".