450213909 has 4 divisors (see below), whose sum is σ = 600285216. Its totient is φ = 300142604.

The previous prime is 450213889. The next prime is 450213923. The reversal of 450213909 is 909312054.

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 a de Polignac number, because none of the positive numbers 2^k-450213909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 450213909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450213209) 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, 75035649 + ... + 75035654.

It is an arithmetic number, because the mean of its divisors is an integer number (150071304).

Almost surely, 2^450213909 is an apocalyptic number.

It is an amenable number.

450213909 is a deficient number, since it is larger than the sum of its proper divisors (150071307).

450213909 is a wasteful number, since it uses less digits than its factorization.

450213909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150071306.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 450213909 is about 21218.2447200517. The cubic root of 450213909 is about 766.4308357401.

The spelling of 450213909 in words is "four hundred fifty million, two hundred thirteen thousand, nine hundred nine".