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999988541 is a prime number
BaseRepresentation
bin111011100110101…
…001110100111101
32120200122200101122
4323212221310331
54021444113131
6243121120325
733531522326
oct7346516475
92520580348
10999988541
11473516212
1223aa890a5
1312c234bc6
1496b4744d
155cbccd7b
hex3b9a9d3d

999988541 has 2 divisors, whose sum is σ = 999988542. Its totient is φ = 999988540.

The previous prime is 999988523. The next prime is 999988543. The reversal of 999988541 is 145889999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622502500 + 377486041 = 24950^2 + 19429^2 .

It is a cyclic number.

It is not a de Polignac number, because 999988541 - 26 = 999988477 is a prime.

Together with 999988543, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999988543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994270 + 499994271.

It is an arithmetic number, because the mean of its divisors is an integer number (499994271).

Almost surely, 2999988541 is an apocalyptic number.

It is an amenable number.

999988541 is a deficient number, since it is larger than the sum of its proper divisors (1).

999988541 is an equidigital number, since it uses as much as digits as its factorization.

999988541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 62.

The square root of 999988541 is about 31622.5954184662. The cubic root of 999988541 is about 999.9961803187.

The spelling of 999988541 in words is "nine hundred ninety-nine million, nine hundred eighty-eight thousand, five hundred forty-one".