Search a number
-
+
606721 is a prime number
BaseRepresentation
bin10010100001000000001
31010211021011
42110020001
5123403341
621000521
75104603
oct2241001
91124234
10606721
11384925
12253141
1318320b
1411b173
15beb81
hex94201

606721 has 2 divisors, whose sum is σ = 606722. Its totient is φ = 606720.

The previous prime is 606673. The next prime is 606731. The reversal of 606721 is 127606.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 65025 = 736^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 606721 - 215 = 573953 is a prime.

It is a super-2 number, since 2×6067212 = 736220743682, which contains 22 as substring.

It is equal to p49603 and since 606721 and 49603 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 606692 and 606701.

It is not a weakly prime, because it can be changed into another prime (606731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303360 + 303361.

It is an arithmetic number, because the mean of its divisors is an integer number (303361).

2606721 is an apocalyptic number.

It is an amenable number.

606721 is a deficient number, since it is larger than the sum of its proper divisors (1).

606721 is an equidigital number, since it uses as much as digits as its factorization.

606721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 606721 is about 778.9229743691. The cubic root of 606721 is about 84.6570262720.

The spelling of 606721 in words is "six hundred six thousand, seven hundred twenty-one".