6431623 has 4 divisors (see below), whose sum is σ = 7016328. Its totient is φ = 5846920.

The previous prime is 6431597. The next prime is 6431641. The reversal of 6431623 is 3261346.

6431623 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6431623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431653) 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, 292336 + ... + 292357.

It is an arithmetic number, because the mean of its divisors is an integer number (1754082).

Almost surely, 2^6431623 is an apocalyptic number.

6431623 is a deficient number, since it is larger than the sum of its proper divisors (584705).

6431623 is a wasteful number, since it uses less digits than its factorization.

6431623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584704.

The product of its digits is 2592, while the sum is 25.

The square root of 6431623 is about 2536.0644707893. The cubic root of 6431623 is about 185.9688447451.

Adding to 6431623 its reverse (3261346), we get a palindrome (9692969).

The spelling of 6431623 in words is "six million, four hundred thirty-one thousand, six hundred twenty-three".