6408438197 has 6 divisors (see below), whose sum is σ = 7454713878. Its totient is φ = 5492946984.

The previous prime is 6408438191. The next prime is 6408438229. The reversal of 6408438197 is 7918348046.

It can be written as a sum of positive squares in only one way, i.e., 3471448561 + 2936989636 = 58919^2 + 54194^2 .

It is not a de Polignac number, because 6408438197 - 2¹⁸ = 6408176053 is a prime.

It is a super-2 number, since 2×6408438197² = 82136160249537221618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408438191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65392178 + ... + 65392275.

It is an arithmetic number, because the mean of its divisors is an integer number (1242452313).

Almost surely, 2^6408438197 is an apocalyptic number.

It is an amenable number.

6408438197 is a deficient number, since it is larger than the sum of its proper divisors (1046275681).

6408438197 is a wasteful number, since it uses less digits than its factorization.

6408438197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130784467 (or 130784460 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 6408438197 is about 80052.7213591143. The cubic root of 6408438197 is about 1857.4511467835.

The spelling of 6408438197 in words is "six billion, four hundred eight million, four hundred thirty-eight thousand, one hundred ninety-seven".