2123513449 has 2 divisors, whose sum is σ = 2123513450. Its totient is φ = 2123513448.

The previous prime is 2123513411. The next prime is 2123513459. The reversal of 2123513449 is 9443153212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2003457600 + 120055849 = 44760^2 + 10957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123513449 - 2²³ = 2115124841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123513459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061756724 + 1061756725.

It is an arithmetic number, because the mean of its divisors is an integer number (1061756725).

Almost surely, 2^2123513449 is an apocalyptic number.

It is an amenable number.

2123513449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123513449 is an equidigital number, since it uses as much as digits as its factorization.

2123513449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 2123513449 is about 46081.5955561437. The cubic root of 2123513449 is about 1285.3409339270.

The spelling of 2123513449 in words is "two billion, one hundred twenty-three million, five hundred thirteen thousand, four hundred forty-nine".