438664497 has 4 divisors (see below), whose sum is σ = 584886000. Its totient is φ = 292442996.

The previous prime is 438664463. The next prime is 438664511. The reversal of 438664497 is 794466834.

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 438664497 - 2⁸ = 438664241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438664097) 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, 73110747 + ... + 73110752.

It is an arithmetic number, because the mean of its divisors is an integer number (146221500).

Almost surely, 2^438664497 is an apocalyptic number.

It is an amenable number.

438664497 is a deficient number, since it is larger than the sum of its proper divisors (146221503).

438664497 is a wasteful number, since it uses less digits than its factorization.

438664497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146221502.

The product of its digits is 3483648, while the sum is 51.

The square root of 438664497 is about 20944.3189672044. The cubic root of 438664497 is about 759.8201888786.

The spelling of 438664497 in words is "four hundred thirty-eight million, six hundred sixty-four thousand, four hundred ninety-seven".