999963247 has 6 divisors (see below), whose sum is σ = 1003103304. Its totient is φ = 996832980.

The previous prime is 999963233. The next prime is 999963253. The reversal of 999963247 is 742369999.

It is not a de Polignac number, because 999963247 - 2¹⁵ = 999930479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999963191 and 999963200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999963047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104998 + ... + 114124.

It is an arithmetic number, because the mean of its divisors is an integer number (167183884).

Almost surely, 2^999963247 is an apocalyptic number.

999963247 is a deficient number, since it is larger than the sum of its proper divisors (3140057).

999963247 is an frugal number, since it uses more digits than its factorization.

999963247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789 (or 9458 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 58.

The square root of 999963247 is about 31622.1954803900. The cubic root of 999963247 is about 999.9877488499.

The spelling of 999963247 in words is "nine hundred ninety-nine million, nine hundred sixty-three thousand, two hundred forty-seven".