6399149 has 4 divisors (see below), whose sum is σ = 6449664. Its totient is φ = 6348636.

The previous prime is 6399139. The next prime is 6399161. The reversal of 6399149 is 9419936.

6399149 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6399149 - 2²⁰ = 5350573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25067 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (1612416).

Almost surely, 2^6399149 is an apocalyptic number.

It is an amenable number.

6399149 is a deficient number, since it is larger than the sum of its proper divisors (50515).

6399149 is a wasteful number, since it uses less digits than its factorization.

6399149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50514.

The product of its digits is 52488, while the sum is 41.

The square root of 6399149 is about 2529.6539289002. The cubic root of 6399149 is about 185.6553238295.

The spelling of 6399149 in words is "six million, three hundred ninety-nine thousand, one hundred forty-nine".