6399475 has 12 divisors (see below), whose sum is σ = 8121256. Its totient is φ = 4999680.

The previous prime is 6399467. The next prime is 6399509. The reversal of 6399475 is 5749936.

It is not a de Polignac number, because 6399475 - 2³ = 6399467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1902 + ... + 4051.

Almost surely, 2^6399475 is an apocalyptic number.

6399475 is a deficient number, since it is larger than the sum of its proper divisors (1721781).

6399475 is a wasteful number, since it uses less digits than its factorization.

6399475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006 (or 6001 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 6399475 is about 2529.7183637710. The cubic root of 6399475 is about 185.6584764679.

The spelling of 6399475 in words is "six million, three hundred ninety-nine thousand, four hundred seventy-five".