2011973 has 2 divisors, whose sum is σ = 2011974. Its totient is φ = 2011972.

The previous prime is 2011957. The next prime is 2011987. The reversal of 2011973 is 3791102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1643524 + 368449 = 1282^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011973 - 2⁴ = 2011957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005986 + 1005987.

It is an arithmetic number, because the mean of its divisors is an integer number (1005987).

2^2011973 is an apocalyptic number.

It is an amenable number.

2011973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011973 is an equidigital number, since it uses as much as digits as its factorization.

2011973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2011973 is about 1418.4403406559. The cubic root of 2011973 is about 126.2430221938.

The spelling of 2011973 in words is "two million, eleven thousand, nine hundred seventy-three".