1023722385449 has 2 divisors, whose sum is σ = 1023722385450. Its totient is φ = 1023722385448.

The previous prime is 1023722385397. The next prime is 1023722385451. The reversal of 1023722385449 is 9445832273201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881170831849 + 142551553600 = 938707^2 + 377560^2 .

It is an emirp because it is prime and its reverse (9445832273201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023722385449 - 2⁸ = 1023722385193 is a prime.

Together with 1023722385451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023722385397 and 1023722385406.

It is not a weakly prime, because it can be changed into another prime (1023722385479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511861192724 + 511861192725.

It is an arithmetic number, because the mean of its divisors is an integer number (511861192725).

Almost surely, 2^{1023722385449} is an apocalyptic number.

It is an amenable number.

1023722385449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023722385449 is an equidigital number, since it uses as much as digits as its factorization.

1023722385449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 1023722385449 in words is "one trillion, twenty-three billion, seven hundred twenty-two million, three hundred eighty-five thousand, four hundred forty-nine".