999961273 has 2 divisors, whose sum is σ = 999961274. Its totient is φ = 999961272.

The previous prime is 999961253. The next prime is 999961289. The reversal of 999961273 is 372169999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620607744 + 379353529 = 24912^2 + 19477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999961273 is a prime.

It is not a weakly prime, because it can be changed into another prime (999961253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499980636 + 499980637.

It is an arithmetic number, because the mean of its divisors is an integer number (499980637).

Almost surely, 2^999961273 is an apocalyptic number.

It is an amenable number.

999961273 is a deficient number, since it is larger than the sum of its proper divisors (1).

999961273 is an equidigital number, since it uses as much as digits as its factorization.

999961273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 55.

The square root of 999961273 is about 31622.1642681205. The cubic root of 999961273 is about 999.9870908334.

The spelling of 999961273 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, two hundred seventy-three".