643413 has 8 divisors (see below), whose sum is σ = 878976. Its totient is φ = 418400.

The previous prime is 643403. The next prime is 643421. The reversal of 643413 is 314346.

643413 is digitally balanced in base 2, 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643413 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 643413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643403) 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, 2493 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (109872).

2⁶⁴³⁴¹³ is an apocalyptic number.

It is an amenable number.

643413 is a deficient number, since it is larger than the sum of its proper divisors (235563).

643413 is a wasteful number, since it uses less digits than its factorization.

643413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275.

The product of its digits is 864, while the sum is 21.

The square root of 643413 is about 802.1302886689. The cubic root of 643413 is about 86.3303053785.

Adding to 643413 its reverse (314346), we get a palindrome (957759).

The spelling of 643413 in words is "six hundred forty-three thousand, four hundred thirteen".