Base | Representation |
---|---|
bin | 111101101010000100111 |
3 | 10210122110022 |
4 | 13231100213 |
5 | 1004123031 |
6 | 111145355 |
7 | 23113232 |
oct | 7552047 |
9 | 3718408 |
10 | 2020391 |
11 | 115aa4a |
12 | 81525b |
13 | 5597c9 |
14 | 3a8419 |
15 | 29d97b |
hex | 1ed427 |
2020391 has 2 divisors, whose sum is σ = 2020392. Its totient is φ = 2020390.
The previous prime is 2020387. The next prime is 2020393. The reversal of 2020391 is 1930202.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 2020391 - 22 = 2020387 is a prime.
It is a Sophie Germain prime.
Together with 2020393, it forms a pair of twin primes.
It is a Chen prime.
It is an Ulam number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2020393) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010195 + 1010196.
It is an arithmetic number, because the mean of its divisors is an integer number (1010196).
22020391 is an apocalyptic number.
2020391 is a deficient number, since it is larger than the sum of its proper divisors (1).
2020391 is an equidigital number, since it uses as much as digits as its factorization.
2020391 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 108, while the sum is 17.
The square root of 2020391 is about 1421.4045870195. The cubic root of 2020391 is about 126.4188421612.
Adding to 2020391 its reverse (1930202), we get a palindrome (3950593).
The spelling of 2020391 in words is "two million, twenty thousand, three hundred ninety-one".
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