6438947319 has 24 divisors (see below), whose sum is σ = 11254632480. Its totient is φ = 3462962688.

The previous prime is 6438947257. The next prime is 6438947321. The reversal of 6438947319 is 9137498346.

It is a happy number.

It is not a de Polignac number, because 6438947319 - 2⁸ = 6438947063 is a prime.

It is a super-2 number, since 2×6438947319² = 82920085153714575522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438947399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3004974 + ... + 3007115.

It is an arithmetic number, because the mean of its divisors is an integer number (468943020).

Almost surely, 2^6438947319 is an apocalyptic number.

6438947319 is a deficient number, since it is larger than the sum of its proper divisors (4815685161).

6438947319 is a wasteful number, since it uses less digits than its factorization.

6438947319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6012119 (or 6012116 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 6438947319 is about 80243.0515309581. The cubic root of 6438947319 is about 1860.3941161031.

The spelling of 6438947319 in words is "six billion, four hundred thirty-eight million, nine hundred forty-seven thousand, three hundred nineteen".