Search a number
620943 = 3263787
BaseRepresentation
bin10010111100110001111
31011112202220
42113212033
5124332233
621150423
75164221
oct2274617
91145686
10620943
11394584
1225b413
1318982b
14122411
15c3eb3
hex9798f

620943 has 8 divisors (see below), whose sum is σ = 832128. Its totient is φ = 411864.

The previous prime is 620933. The next prime is 620947. The reversal of 620943 is 349026.

Adding to 620943 its reverse (349026), we get a palindrome (969969).

It is a Cunningham number, because it is equal to 7882-1.

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

It is not a de Polignac number, because 620943 - 25 = 620911 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620947) 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, 396 + ... + 1182.

It is an arithmetic number, because the mean of its divisors is an integer number (104016).

2620943 is an apocalyptic number.

620943 is a deficient number, since it is larger than the sum of its proper divisors (211185).

620943 is a wasteful number, since it uses less digits than its factorization.

620943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 620943 is about 787.9993654820. Note that the first 3 decimals coincide. The cubic root of 620943 is about 85.3133990030.

The spelling of 620943 in words is "six hundred twenty thousand, nine hundred forty-three".

Divisors: 1 3 263 787 789 2361 206981 620943