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999986641 is a prime number
BaseRepresentation
bin111011100110101…
…001010111010001
32120200122120210021
4323212221113101
54021444033031
6243121103441
733531513643
oct7346512721
92520576707
10999986641
11473514845
1223aa87b81
1312c234094
1496b46893
155cbcc511
hex3b9a95d1

999986641 has 2 divisors, whose sum is σ = 999986642. Its totient is φ = 999986640.

The previous prime is 999986639. The next prime is 999986651. The reversal of 999986641 is 146689999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615238416 + 384748225 = 24804^2 + 19615^2 .

It is a cyclic number.

It is not a de Polignac number, because 999986641 - 21 = 999986639 is a prime.

Together with 999986639, it forms a pair of twin primes.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999986641.

It is not a weakly prime, because it can be changed into another prime (999986651) 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, 499993320 + 499993321.

It is an arithmetic number, because the mean of its divisors is an integer number (499993321).

Almost surely, 2999986641 is an apocalyptic number.

It is an amenable number.

999986641 is a deficient number, since it is larger than the sum of its proper divisors (1).

999986641 is an equidigital number, since it uses as much as digits as its factorization.

999986641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 61.

The square root of 999986641 is about 31622.5653766420. The cubic root of 999986641 is about 999.9955469802.

The spelling of 999986641 in words is "nine hundred ninety-nine million, nine hundred eighty-six thousand, six hundred forty-one".