1973021 has 2 divisors, whose sum is σ = 1973022. Its totient is φ = 1973020.

The previous prime is 1973011. The next prime is 1973033. The reversal of 1973021 is 1203791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 319225 = 1286^2 + 565^2 .

It is an emirp because it is prime and its reverse (1203791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1973021 - 2¹⁴ = 1956637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986510 + 986511.

It is an arithmetic number, because the mean of its divisors is an integer number (986511).

2^1973021 is an apocalyptic number.

It is an amenable number.

1973021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973021 is an equidigital number, since it uses as much as digits as its factorization.

1973021 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 1973021 is about 1404.6426591842. The cubic root of 1973021 is about 125.4230148527.

The spelling of 1973021 in words is "one million, nine hundred seventy-three thousand, twenty-one".