6400699 has 4 divisors (see below), whose sum is σ = 6408664. Its totient is φ = 6392736.

The previous prime is 6400697. The next prime is 6400717. The reversal of 6400699 is 9960046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6400699 - 2¹ = 6400697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400697) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2622 + ... + 4435.

It is an arithmetic number, because the mean of its divisors is an integer number (1602166).

Almost surely, 2^6400699 is an apocalyptic number.

6400699 is a deficient number, since it is larger than the sum of its proper divisors (7965).

6400699 is an equidigital number, since it uses as much as digits as its factorization.

6400699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6400699 is about 2529.9602763680. The cubic root of 6400699 is about 185.6703124122.

The spelling of 6400699 in words is "six million, four hundred thousand, six hundred ninety-nine".