449473993 has 2 divisors, whose sum is σ = 449473994. Its totient is φ = 449473992.

The previous prime is 449473963. The next prime is 449474017. The reversal of 449473993 is 399374944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282340809 + 167133184 = 16803^2 + 12928^2 .

It is a cyclic number.

It is not a de Polignac number, because 449473993 - 2¹⁷ = 449342921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 449473993.

It is not a weakly prime, because it can be changed into another prime (449473963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224736996 + 224736997.

It is an arithmetic number, because the mean of its divisors is an integer number (224736997).

Almost surely, 2^449473993 is an apocalyptic number.

It is an amenable number.

449473993 is a deficient number, since it is larger than the sum of its proper divisors (1).

449473993 is an equidigital number, since it uses as much as digits as its factorization.

449473993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 52.

The square root of 449473993 is about 21200.8017065393. The cubic root of 449473993 is about 766.0107351467.

It can be divided in two parts, 4494 and 73993, that added together give a palindrome (78487).

The spelling of 449473993 in words is "four hundred forty-nine million, four hundred seventy-three thousand, nine hundred ninety-three".