438136913 has 4 divisors (see below), whose sum is σ = 457186368. Its totient is φ = 419087460.

The previous prime is 438136877. The next prime is 438136931. The reversal of 438136913 is 319631834.

It is a happy number.

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 438136913 - 2¹⁰ = 438135889 is a prime.

It is a super-3 number, since 3×438136913³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438136973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9524693 + ... + 9524738.

It is an arithmetic number, because the mean of its divisors is an integer number (114296592).

Almost surely, 2^438136913 is an apocalyptic number.

It is an amenable number.

438136913 is a deficient number, since it is larger than the sum of its proper divisors (19049455).

438136913 is a wasteful number, since it uses less digits than its factorization.

438136913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049454.

The product of its digits is 46656, while the sum is 38.

The square root of 438136913 is about 20931.7202589754. The cubic root of 438136913 is about 759.5154534876.

The spelling of 438136913 in words is "four hundred thirty-eight million, one hundred thirty-six thousand, nine hundred thirteen".