2123450489 has 2 divisors, whose sum is σ = 2123450490. Its totient is φ = 2123450488.

The previous prime is 2123450437. The next prime is 2123450491. The reversal of 2123450489 is 9840543212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1247290489 + 876160000 = 35317^2 + 29600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123450489 - 2⁸ = 2123450233 is a prime.

It is a Sophie Germain prime.

Together with 2123450491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2123450419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061725244 + 1061725245.

It is an arithmetic number, because the mean of its divisors is an integer number (1061725245).

Almost surely, 2^2123450489 is an apocalyptic number.

It is an amenable number.

2123450489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123450489 is an equidigital number, since it uses as much as digits as its factorization.

2123450489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2123450489 is about 46080.9124150119. The cubic root of 2123450489 is about 1285.3282307871.

The spelling of 2123450489 in words is "two billion, one hundred twenty-three million, four hundred fifty thousand, four hundred eighty-nine".