2021937 has 4 divisors (see below), whose sum is σ = 2695920. Its totient is φ = 1347956.

The previous prime is 2021933. The next prime is 2021959. The reversal of 2021937 is 7391202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021937 - 2² = 2021933 is a prime.

It is a D-number.

2021937 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2021933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336987 + ... + 336992.

It is an arithmetic number, because the mean of its divisors is an integer number (673980).

2^2021937 is an apocalyptic number.

It is an amenable number.

2021937 is a deficient number, since it is larger than the sum of its proper divisors (673983).

2021937 is an equidigital number, since it uses as much as digits as its factorization.

2021937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673982.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2021937 is about 1421.9483112969. The cubic root of 2021937 is about 126.4510791061.

The spelling of 2021937 in words is "two million, twenty-one thousand, nine hundred thirty-seven".