449928393917 has 2 divisors, whose sum is σ = 449928393918. Its totient is φ = 449928393916.

The previous prime is 449928393899. The next prime is 449928393919. The reversal of 449928393917 is 719393829944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448811564356 + 1116829561 = 669934^2 + 33419^2 .

It is a cyclic number.

It is not a de Polignac number, because 449928393917 - 2⁸ = 449928393661 is a prime.

It is a super-2 number, since 2×449928393917² (a number of 24 digits) contains 22 as substring.

Together with 449928393919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449928393919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224964196958 + 224964196959.

It is an arithmetic number, because the mean of its divisors is an integer number (224964196959).

Almost surely, 2^449928393917 is an apocalyptic number.

It is an amenable number.

449928393917 is a deficient number, since it is larger than the sum of its proper divisors (1).

449928393917 is an equidigital number, since it uses as much as digits as its factorization.

449928393917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105815808, while the sum is 68.

The spelling of 449928393917 in words is "four hundred forty-nine billion, nine hundred twenty-eight million, three hundred ninety-three thousand, nine hundred seventeen".