2123726573 has 2 divisors, whose sum is σ = 2123726574. Its totient is φ = 2123726572.

The previous prime is 2123726557. The next prime is 2123726599. The reversal of 2123726573 is 3756273212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1739056804 + 384669769 = 41702^2 + 19613^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123726573 - 2⁴ = 2123726557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123725573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061863286 + 1061863287.

It is an arithmetic number, because the mean of its divisors is an integer number (1061863287).

Almost surely, 2^2123726573 is an apocalyptic number.

It is an amenable number.

2123726573 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123726573 is an equidigital number, since it uses as much as digits as its factorization.

2123726573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 38.

The square root of 2123726573 is about 46083.9079614566. The cubic root of 2123726573 is about 1285.3839330797.

Adding to 2123726573 its reverse (3756273212), we get a palindrome (5879999785).

The spelling of 2123726573 in words is "two billion, one hundred twenty-three million, seven hundred twenty-six thousand, five hundred seventy-three".