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664019 is a prime number
BaseRepresentation
bin10100010000111010011
31020201212022
42202013103
5132222034
622122055
75433626
oct2420723
91221768
10664019
11413984
1228032b
131a3315
14133dbd
15d1b2e
hexa21d3

664019 has 2 divisors, whose sum is σ = 664020. Its totient is φ = 664018.

The previous prime is 664009. The next prime is 664043. The reversal of 664019 is 910466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664019 - 28 = 663763 is a prime.

It is a super-2 number, since 2×6640192 = 881842464722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332009 + 332010.

It is an arithmetic number, because the mean of its divisors is an integer number (332010).

2664019 is an apocalyptic number.

664019 is a deficient number, since it is larger than the sum of its proper divisors (1).

664019 is an equidigital number, since it uses as much as digits as its factorization.

664019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 664019 is about 814.8736098316. The cubic root of 664019 is about 87.2422455431.

The spelling of 664019 in words is "six hundred sixty-four thousand, nineteen".