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489631 is a prime number
BaseRepresentation
bin1110111100010011111
3220212122111
41313202133
5111132011
614254451
74106332
oct1674237
9825574
10489631
1130495a
121b7427
13141b2c
14ca619
159a121
hex7789f

489631 has 2 divisors, whose sum is σ = 489632. Its totient is φ = 489630.

The previous prime is 489613. The next prime is 489653. The reversal of 489631 is 136984.

Together with previous prime (489613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-489631 is a prime.

It is a super-2 number, since 2×4896312 = 479477032322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 489593 and 489602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489691) 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, 244815 + 244816.

It is an arithmetic number, because the mean of its divisors is an integer number (244816).

2489631 is an apocalyptic number.

489631 is a deficient number, since it is larger than the sum of its proper divisors (1).

489631 is an equidigital number, since it uses as much as digits as its factorization.

489631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 489631 is about 699.7363789314. The cubic root of 489631 is about 78.8175568771.

The spelling of 489631 in words is "four hundred eighty-nine thousand, six hundred thirty-one".