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641387 is a prime number
BaseRepresentation
bin10011100100101101011
31012120211002
42130211223
5131011022
621425215
75310635
oct2344553
91176732
10641387
113a897a
1226b20b
13195c26
14129a55
15ca092
hex9c96b

641387 has 2 divisors, whose sum is σ = 641388. Its totient is φ = 641386.

The previous prime is 641371. The next prime is 641411. The reversal of 641387 is 783146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641387 - 24 = 641371 is a prime.

It is a super-2 number, since 2×6413872 = 822754567538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320693 + 320694.

It is an arithmetic number, because the mean of its divisors is an integer number (320694).

2641387 is an apocalyptic number.

641387 is a deficient number, since it is larger than the sum of its proper divisors (1).

641387 is an equidigital number, since it uses as much as digits as its factorization.

641387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 641387 is about 800.8664058381. The cubic root of 641387 is about 86.2395968689.

The spelling of 641387 in words is "six hundred forty-one thousand, three hundred eighty-seven".