6438969 has 6 divisors (see below), whose sum is σ = 9300746. Its totient is φ = 4292640.

The previous prime is 6438961. The next prime is 6438973. The reversal of 6438969 is 9698346.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 2518569 = 1980^2 + 1587^2 .

It is not a de Polignac number, because 6438969 - 2³ = 6438961 is a prime.

It is a super-2 number, since 2×6438969² = 82920643565922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6438961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357712 + ... + 357729.

Almost surely, 2^6438969 is an apocalyptic number.

It is an amenable number.

6438969 is a deficient number, since it is larger than the sum of its proper divisors (2861777).

6438969 is a wasteful number, since it uses less digits than its factorization.

6438969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715447 (or 715444 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 6438969 is about 2537.5123645019. The cubic root of 6438969 is about 186.0396204186.

The spelling of 6438969 in words is "six million, four hundred thirty-eight thousand, nine hundred sixty-nine".