449011993 has 4 divisors (see below), whose sum is σ = 451872100. Its totient is φ = 446151888.

The previous prime is 449011987. The next prime is 449012021. The reversal of 449011993 is 399110944.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59028489 + 389983504 = 7683^2 + 19748^2 .

It is a cyclic number.

It is not a de Polignac number, because 449011993 - 2⁵ = 449011961 is a prime.

It is a super-2 number, since 2×449011993² = 403223539715664098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449011793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429818 + ... + 1430131.

It is an arithmetic number, because the mean of its divisors is an integer number (112968025).

Almost surely, 2^449011993 is an apocalyptic number.

It is an amenable number.

449011993 is a deficient number, since it is larger than the sum of its proper divisors (2860107).

449011993 is a wasteful number, since it uses less digits than its factorization.

449011993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860106.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 449011993 is about 21189.9030908591. The cubic root of 449011993 is about 765.7481924949.

The spelling of 449011993 in words is "four hundred forty-nine million, eleven thousand, nine hundred ninety-three".