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999998999999 is a prime number
BaseRepresentation
bin11101000110101001001…
…01011100110110111111
310112121011122112121201222
432203110211130312333
5112340444220444444
62043220533023555
7132150623152406
oct16432445346677
93477148477658
10999998999999
1135610840264a
12141981784bbb
13733b800861c
143658626663d
151b02b619eee
hexe8d495cdbf

999998999999 has 2 divisors, whose sum is σ = 999999000000. Its totient is φ = 999998999998.

The previous prime is 999998999957. The next prime is 999999000001. The reversal of 999998999999 is 999999899999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998999999 - 232 = 995704032703 is a prime.

Together with 999999000001, it forms a pair of twin primes.

It is a Chen prime.

999998999999 is a modest number, since divided by 999999 gives 999998 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 999998999896 and 999998999905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998999899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999499999 + 499999500000.

It is an arithmetic number, because the mean of its divisors is an integer number (499999500000).

Almost surely, 2999998999999 is an apocalyptic number.

999998999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998999999 is an equidigital number, since it uses as much as digits as its factorization.

999998999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 251048476872, while the sum is 107.

The spelling of 999998999999 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".