449140813 has 4 divisors (see below), whose sum is σ = 489971808. Its totient is φ = 408309820.

The previous prime is 449140801. The next prime is 449140841. The reversal of 449140813 is 318041944.

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.

It is a cyclic number.

It is not a de Polignac number, because 449140813 - 2⁹ = 449140301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449147813) 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, 20415481 + ... + 20415502.

It is an arithmetic number, because the mean of its divisors is an integer number (122492952).

Almost surely, 2^449140813 is an apocalyptic number.

It is an amenable number.

449140813 is a deficient number, since it is larger than the sum of its proper divisors (40830995).

449140813 is a wasteful number, since it uses less digits than its factorization.

449140813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40830994.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 449140813 is about 21192.9425281153. The cubic root of 449140813 is about 765.8214156691.

The spelling of 449140813 in words is "four hundred forty-nine million, one hundred forty thousand, eight hundred thirteen".