9999999673 has 2 divisors, whose sum is σ = 9999999674. Its totient is φ = 9999999672.

The previous prime is 9999999661. The next prime is 9999999679. The reversal of 9999999673 is 3769999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6044596009 + 3955403664 = 77747^2 + 62892^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999999673 - 2⁹ = 9999999161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9999999593 and 9999999602.

It is not a weakly prime, because it can be changed into another prime (9999999679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999999836 + 4999999837.

It is an arithmetic number, because the mean of its divisors is an integer number (4999999837).

Almost surely, 2^9999999673 is an apocalyptic number.

It is an amenable number.

9999999673 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999999673 is an equidigital number, since it uses as much as digits as its factorization.

9999999673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602654094, while the sum is 79.

The square root of 9999999673 is about 99999.9983650000. The cubic root of 9999999673 is about 2154.4346665485.

The spelling of 9999999673 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred seventy-three".