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999950891 is a prime number
BaseRepresentation
bin111011100110100…
…000101000101011
32120200120202202012
4323212200220223
54021441412031
6243120230135
733531304502
oct7346405053
92520522665
10999950891
1147349a9a5
1223aa6b34b
1312c220a24
1496b37839
155cbc1b2b
hex3b9a0a2b

999950891 has 2 divisors, whose sum is σ = 999950892. Its totient is φ = 999950890.

The previous prime is 999950881. The next prime is 999950893. The reversal of 999950891 is 198059999.

999950891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (198059999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999950891 - 218 = 999688747 is a prime.

Together with 999950893, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999950891.

It is not a weakly prime, because it can be changed into another prime (999950893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499975445 + 499975446.

It is an arithmetic number, because the mean of its divisors is an integer number (499975446).

Almost surely, 2999950891 is an apocalyptic number.

999950891 is a deficient number, since it is larger than the sum of its proper divisors (1).

999950891 is an equidigital number, since it uses as much as digits as its factorization.

999950891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2361960, while the sum is 59.

The square root of 999950891 is about 31622.0001106824. Note that the first 3 decimals coincide. The cubic root of 999950891 is about 999.9836300654.

The spelling of 999950891 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, eight hundred ninety-one".