6399907 has 8 divisors (see below), whose sum is σ = 6609600. Its totient is φ = 6193704.

The previous prime is 6399889. The next prime is 6399917. The reversal of 6399907 is 7099936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6399907 - 2¹⁹ = 5875619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6399917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3144 + ... + 4762.

It is an arithmetic number, because the mean of its divisors is an integer number (826200).

Almost surely, 2^6399907 is an apocalyptic number.

6399907 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

6399907 is a deficient number, since it is larger than the sum of its proper divisors (209693).

6399907 is a wasteful number, since it uses less digits than its factorization.

6399907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 6399907 is about 2529.8037473290. The cubic root of 6399907 is about 185.6626540323.

The spelling of 6399907 in words is "six million, three hundred ninety-nine thousand, nine hundred seven".