Base | Representation |
---|---|
bin | 10010111110110101101 |
3 | 1011121012221 |
4 | 2113312231 |
5 | 124400442 |
6 | 21155341 |
7 | 5200255 |
oct | 2276655 |
9 | 1147187 |
10 | 621997 |
11 | 395352 |
12 | 25bb51 |
13 | 18a15c |
14 | 122965 |
15 | c4467 |
hex | 97dad |
621997 has 2 divisors, whose sum is σ = 621998. Its totient is φ = 621996.
The previous prime is 621983. The next prime is 622009. The reversal of 621997 is 799126.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 594441 + 27556 = 771^2 + 166^2 .
621997 is a truncatable prime.
It is a cyclic number.
It is not a de Polignac number, because 621997 - 27 = 621869 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (621937) 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 as a sum of consecutive naturals, namely, 310998 + 310999.
It is an arithmetic number, because the mean of its divisors is an integer number (310999).
2621997 is an apocalyptic number.
It is an amenable number.
621997 is a deficient number, since it is larger than the sum of its proper divisors (1).
621997 is an equidigital number, since it uses as much as digits as its factorization.
621997 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6804, while the sum is 34.
The square root of 621997 is about 788.6678641862. The cubic root of 621997 is about 85.3616425578.
The spelling of 621997 in words is "six hundred twenty-one thousand, nine hundred ninety-seven".
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