449047993 has 4 divisors (see below), whose sum is σ = 449093008. Its totient is φ = 449002980.

The previous prime is 449047981. The next prime is 449047999. The reversal of 449047993 is 399740944.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449047993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449047999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 29968.

It is an arithmetic number, because the mean of its divisors is an integer number (112273252).

Almost surely, 2^449047993 is an apocalyptic number.

It is an amenable number.

449047993 is a deficient number, since it is larger than the sum of its proper divisors (45015).

449047993 is a wasteful number, since it uses less digits than its factorization.

449047993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45014.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 449047993 is about 21190.7525350092. The cubic root of 449047993 is about 765.7686568319.

The spelling of 449047993 in words is "four hundred forty-nine million, forty-seven thousand, nine hundred ninety-three".