Base | Representation |
---|---|
bin | 11001011111010… |
… | …000000110011001 |
3 | 1002210122111012211 |
4 | 121133100012121 |
5 | 1333432412214 |
6 | 110233235121 |
7 | 13411506505 |
oct | 3137200631 |
9 | 1083574184 |
10 | 427622809 |
11 | 1aa422389 |
12 | bb262aa1 |
13 | 6a793563 |
14 | 40b15305 |
15 | 2781d0c4 |
hex | 197d0199 |
427622809 has 2 divisors, whose sum is σ = 427622810. Its totient is φ = 427622808.
The previous prime is 427622771. The next prime is 427622837. The reversal of 427622809 is 908226724.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 225840784 + 201782025 = 15028^2 + 14205^2 .
It is a cyclic number.
It is not a de Polignac number, because 427622809 - 27 = 427622681 is a prime.
It is a super-2 number, since 2×4276228092 = 365722533554100962, which contains 22 as substring.
It is equal to p22728397 and since 427622809 and 22728397 have the same sum of digits, it is a Honaker prime.
It is not a weakly prime, because it can be changed into another prime (427622869) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213811404 + 213811405.
It is an arithmetic number, because the mean of its divisors is an integer number (213811405).
Almost surely, 2427622809 is an apocalyptic number.
It is an amenable number.
427622809 is a deficient number, since it is larger than the sum of its proper divisors (1).
427622809 is an equidigital number, since it uses as much as digits as its factorization.
427622809 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 96768, while the sum is 40.
The square root of 427622809 is about 20679.0427486381. The cubic root of 427622809 is about 753.3907562975.
The spelling of 427622809 in words is "four hundred twenty-seven million, six hundred twenty-two thousand, eight hundred nine".
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