646701323 has 16 divisors (see below), whose sum is σ = 691649280. Its totient is φ = 603609600.

The previous prime is 646701317. The next prime is 646701329. The reversal of 646701323 is 323107646.

It is an interprime number because it is at equal distance from previous prime (646701317) and next prime (646701329).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646701323 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 646701323.

It is not an unprimeable number, because it can be changed into a prime (646701329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110261 + ... + 115977.

It is an arithmetic number, because the mean of its divisors is an integer number (43228080).

Almost surely, 2^646701323 is an apocalyptic number.

646701323 is a deficient number, since it is larger than the sum of its proper divisors (44947957).

646701323 is a wasteful number, since it uses less digits than its factorization.

646701323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 646701323 is about 25430.3229039664. The cubic root of 646701323 is about 864.7712640989.

Adding to 646701323 its reverse (323107646), we get a palindrome (969808969).

The spelling of 646701323 in words is "six hundred forty-six million, seven hundred one thousand, three hundred twenty-three".