438013399 has 4 divisors (see below), whose sum is σ = 439207264. Its totient is φ = 436819536.

The previous prime is 438013321. The next prime is 438013409. The reversal of 438013399 is 993310834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438013399 - 2¹³ = 438005207 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 (438013309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596382 + ... + 597115.

It is an arithmetic number, because the mean of its divisors is an integer number (109801816).

Almost surely, 2^438013399 is an apocalyptic number.

438013399 is a deficient number, since it is larger than the sum of its proper divisors (1193865).

438013399 is a wasteful number, since it uses less digits than its factorization.

438013399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193864.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 438013399 is about 20928.7696485006. The cubic root of 438013399 is about 759.4440757929. Note that the first 3 decimals are identical.

The spelling of 438013399 in words is "four hundred thirty-eight million, thirteen thousand, three hundred ninety-nine".