6450999 has 4 divisors (see below), whose sum is σ = 8601336. Its totient is φ = 4300664.

The previous prime is 6450953. The next prime is 6451019. The reversal of 6450999 is 9990546.

It is a happy number.

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 6450999 - 2⁹ = 6450487 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6450999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075164 + ... + 1075169.

It is an arithmetic number, because the mean of its divisors is an integer number (2150334).

Almost surely, 2^6450999 is an apocalyptic number.

6450999 is a deficient number, since it is larger than the sum of its proper divisors (2150337).

6450999 is a wasteful number, since it uses less digits than its factorization.

6450999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150336.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 6450999 is about 2539.8816901580. The cubic root of 6450999 is about 186.1554083282.

The spelling of 6450999 in words is "six million, four hundred fifty thousand, nine hundred ninety-nine".