646313423 has 8 divisors (see below), whose sum is σ = 749668992. Its totient is φ = 545714136.

The previous prime is 646313413. The next prime is 646313453. The reversal of 646313423 is 324313646.

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

It is a cyclic number.

It is not a de Polignac number, because 646313423 - 2⁸ = 646313167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646313423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646313413) 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, 688565 + ... + 689502.

It is an arithmetic number, because the mean of its divisors is an integer number (93708624).

Almost surely, 2^646313423 is an apocalyptic number.

646313423 is a deficient number, since it is larger than the sum of its proper divisors (103355569).

646313423 is a wasteful number, since it uses less digits than its factorization.

646313423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378141.

The product of its digits is 31104, while the sum is 32.

The square root of 646313423 is about 25422.6950380954. The cubic root of 646313423 is about 864.5983291072.

The spelling of 646313423 in words is "six hundred forty-six million, three hundred thirteen thousand, four hundred twenty-three".