449621863 has 2 divisors, whose sum is σ = 449621864. Its totient is φ = 449621862.

The previous prime is 449621813. The next prime is 449621903. The reversal of 449621863 is 368126944.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 449621863 - 2⁹ = 449621351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449621813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224810931 + 224810932.

It is an arithmetic number, because the mean of its divisors is an integer number (224810932).

Almost surely, 2^449621863 is an apocalyptic number.

449621863 is a deficient number, since it is larger than the sum of its proper divisors (1).

449621863 is an equidigital number, since it uses as much as digits as its factorization.

449621863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 449621863 is about 21204.2887878844. The cubic root of 449621863 is about 766.0947278360.

The spelling of 449621863 in words is "four hundred forty-nine million, six hundred twenty-one thousand, eight hundred sixty-three".