438823009 has 4 divisors (see below), whose sum is σ = 439346880. Its totient is φ = 438299140.

The previous prime is 438822971. The next prime is 438823013. The reversal of 438823009 is 900328834.

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 438823009 - 2²¹ = 436725857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438823019) 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, 260677 + ... + 262354.

It is an arithmetic number, because the mean of its divisors is an integer number (109836720).

Almost surely, 2^438823009 is an apocalyptic number.

It is an amenable number.

438823009 is a deficient number, since it is larger than the sum of its proper divisors (523871).

438823009 is an equidigital number, since it uses as much as digits as its factorization.

438823009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523870.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 438823009 is about 20948.1027541875. The cubic root of 438823009 is about 759.9116985360.

The spelling of 438823009 in words is "four hundred thirty-eight million, eight hundred twenty-three thousand, nine".