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945989509 is a prime number
BaseRepresentation
bin111000011000101…
…010011110000101
32102221001020122111
4320120222132011
53414133131014
6233511501021
732304530623
oct7030523605
92387036574
10945989509
11445a93a13
12224987771
13120ca950a
148d8cc513
15580b32c4
hex3862a785

945989509 has 2 divisors, whose sum is σ = 945989510. Its totient is φ = 945989508.

The previous prime is 945989507. The next prime is 945989621. The reversal of 945989509 is 905989549.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816530625 + 129458884 = 28575^2 + 11378^2 .

It is an emirp because it is prime and its reverse (905989549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945989509 - 21 = 945989507 is a prime.

It is a super-2 number, since 2×9459895092 = 1789792302276122162, which contains 22 as substring.

Together with 945989507, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945989507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472994754 + 472994755.

It is an arithmetic number, because the mean of its divisors is an integer number (472994755).

Almost surely, 2945989509 is an apocalyptic number.

It is an amenable number.

945989509 is a deficient number, since it is larger than the sum of its proper divisors (1).

945989509 is an equidigital number, since it uses as much as digits as its factorization.

945989509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5248800, while the sum is 58.

The square root of 945989509 is about 30756.9424520709. The cubic root of 945989509 is about 981.6622867579.

The spelling of 945989509 in words is "nine hundred forty-five million, nine hundred eighty-nine thousand, five hundred nine".