Search a number
630643 = 13139349
BaseRepresentation
bin10011001111101110011
31012001002011
42121331303
5130140033
621303351
75234416
oct2317563
91161064
10630643
113a08a2
12264b57
13191080
14125b7d
15c6ccd
hex99f73

630643 has 8 divisors (see below), whose sum is σ = 686000. Its totient is φ = 576288.

The previous prime is 630613. The next prime is 630659. The reversal of 630643 is 346036.

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 630643 - 217 = 499571 is a prime.

It is a Duffinian number.

630643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (630613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (85750).

2630643 is an apocalyptic number.

630643 is a deficient number, since it is larger than the sum of its proper divisors (55357).

630643 is a wasteful number, since it uses less digits than its factorization.

630643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 630643 is about 794.1303419465. The cubic root of 630643 is about 85.7553439538.

Adding to 630643 its reverse (346036), we get a palindrome (976679).

The spelling of 630643 in words is "six hundred thirty thousand, six hundred forty-three".

Divisors: 1 13 139 349 1807 4537 48511 630643