6499623 has 8 divisors (see below), whose sum is σ = 9332848. Its totient is φ = 3999744.

The previous prime is 6499601. The next prime is 6499631. The reversal of 6499623 is 3269946.

It is a happy number.

6499623 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6499623 - 2⁹ = 6499111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 166657 = 6499623 / (6 + 4 + 9 + 9 + 6 + 2 + 3).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499663) 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, 83290 + ... + 83367.

It is an arithmetic number, because the mean of its divisors is an integer number (1166606).

Almost surely, 2^6499623 is an apocalyptic number.

6499623 is a deficient number, since it is larger than the sum of its proper divisors (2833225).

6499623 is a wasteful number, since it uses less digits than its factorization.

6499623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166673.

The product of its digits is 69984, while the sum is 39.

The square root of 6499623 is about 2549.4358199413. The cubic root of 6499623 is about 186.6219496770.

The spelling of 6499623 in words is "six million, four hundred ninety-nine thousand, six hundred twenty-three".