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945989621 is a prime number
BaseRepresentation
bin111000011000101…
…010011111110101
32102221001020210122
4320120222133311
53414133131441
6233511501325
732304531143
oct7030523765
92387036718
10945989621
11445a94005
12224987845
13120ca9595
148d8cc593
15580b334b
hex3862a7f5

945989621 has 2 divisors, whose sum is σ = 945989622. Its totient is φ = 945989620.

The previous prime is 945989509. The next prime is 945989623. The reversal of 945989621 is 126989549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 940648900 + 5340721 = 30670^2 + 2311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-945989621 is a prime.

Together with 945989623, 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 (945989623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472994810 + 472994811.

It is an arithmetic number, because the mean of its divisors is an integer number (472994811).

Almost surely, 2945989621 is an apocalyptic number.

It is an amenable number.

945989621 is a deficient number, since it is larger than the sum of its proper divisors (1).

945989621 is an equidigital number, since it uses as much as digits as its factorization.

945989621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 945989621 is about 30756.9442727980. The cubic root of 945989621 is about 981.6623254990.

The spelling of 945989621 in words is "nine hundred forty-five million, nine hundred eighty-nine thousand, six hundred twenty-one".