449172813 has 4 divisors (see below), whose sum is σ = 598897088. Its totient is φ = 299448540.

The previous prime is 449172811. The next prime is 449172847. The reversal of 449172813 is 318271944.

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 not a de Polignac number, because 449172813 - 2¹ = 449172811 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 (449172811) 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, 74862133 + ... + 74862138.

It is an arithmetic number, because the mean of its divisors is an integer number (149724272).

Almost surely, 2^449172813 is an apocalyptic number.

It is an amenable number.

449172813 is a deficient number, since it is larger than the sum of its proper divisors (149724275).

449172813 is a wasteful number, since it uses less digits than its factorization.

449172813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149724274.

The product of its digits is 48384, while the sum is 39.

The square root of 449172813 is about 21193.6974829783. The cubic root of 449172813 is about 765.8396027667.

The spelling of 449172813 in words is "four hundred forty-nine million, one hundred seventy-two thousand, eight hundred thirteen".