449144991 has 12 divisors (see below), whose sum is σ = 650882232. Its totient is φ = 298452816.

The previous prime is 449144987. The next prime is 449145007. The reversal of 449144991 is 199441944.

It is not a de Polignac number, because 449144991 - 2² = 449144987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449144911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78516 + ... + 84041.

It is an arithmetic number, because the mean of its divisors is an integer number (54240186).

Almost surely, 2^449144991 is an apocalyptic number.

449144991 is a deficient number, since it is larger than the sum of its proper divisors (201737241).

449144991 is a wasteful number, since it uses less digits than its factorization.

449144991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162870 (or 162867 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 449144991 is about 21193.0410984361. The cubic root of 449144991 is about 765.8237902711.

The spelling of 449144991 in words is "four hundred forty-nine million, one hundred forty-four thousand, nine hundred ninety-one".