999989968927 has 2 divisors, whose sum is σ = 999989968928. Its totient is φ = 999989968926.

The previous prime is 999989968847. The next prime is 999989968937. The reversal of 999989968927 is 729869989999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999989968927 - 2¹⁵ = 999989936159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999989968937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994984463 + 499994984464.

It is an arithmetic number, because the mean of its divisors is an integer number (499994984464).

Almost surely, 2^999989968927 is an apocalyptic number.

999989968927 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989968927 is an equidigital number, since it uses as much as digits as its factorization.

999989968927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25713241344, while the sum is 94.

The spelling of 999989968927 in words is "nine hundred ninety-nine billion, nine hundred eighty-nine million, nine hundred sixty-eight thousand, nine hundred twenty-seven".