449843921 has 2 divisors, whose sum is σ = 449843922. Its totient is φ = 449843920.

The previous prime is 449843917. The next prime is 449843939. The reversal of 449843921 is 129348944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374848321 + 74995600 = 19361^2 + 8660^2 .

It is a cyclic number.

It is not a de Polignac number, because 449843921 - 2² = 449843917 is a prime.

It is not a weakly prime, because it can be changed into another prime (449843971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224921960 + 224921961.

It is an arithmetic number, because the mean of its divisors is an integer number (224921961).

Almost surely, 2^449843921 is an apocalyptic number.

It is an amenable number.

449843921 is a deficient number, since it is larger than the sum of its proper divisors (1).

449843921 is an equidigital number, since it uses as much as digits as its factorization.

449843921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 449843921 is about 21209.5242992388. The cubic root of 449843921 is about 766.2208259931.

The spelling of 449843921 in words is "four hundred forty-nine million, eight hundred forty-three thousand, nine hundred twenty-one".