999999951110989 has 2 divisors, whose sum is σ = 999999951110990. Its totient is φ = 999999951110988.

The previous prime is 999999951110903. The next prime is 999999951110999. The reversal of 999999951110989 is 989011159999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 833774576274025 + 166225374836964 = 28875155^2 + 12892842^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999951110989 - 2⁹ = 999999951110477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999999951110989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999951110999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999975555494 + 499999975555495.

It is an arithmetic number, because the mean of its divisors is an integer number (499999975555495).

Almost surely, 2^{999999951110989} is an apocalyptic number.

It is an amenable number.

999999951110989 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999951110989 is an equidigital number, since it uses as much as digits as its factorization.

999999951110989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15496819560, while the sum is 97.

The spelling of 999999951110989 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred fifty-one million, one hundred ten thousand, nine hundred eighty-nine".