999999063 has 12 divisors (see below), whose sum is σ = 1650792208. Its totient is φ = 571428000.

The previous prime is 999999059. The next prime is 999999067. The reversal of 999999063 is 360999999.

It is an interprime number because it is at equal distance from previous prime (999999059) and next prime (999999067).

It is not a de Polignac number, because 999999063 - 2² = 999999059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 15873001 = 999999063 / (9 + 9 + 9 + 9 + 9 + 9 + 0 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7936438 + ... + 7936563.

Almost surely, 2^999999063 is an apocalyptic number.

999999063 is a deficient number, since it is larger than the sum of its proper divisors (650793145).

999999063 is a wasteful number, since it uses less digits than its factorization.

999999063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15873014 (or 15873011 counting only the distinct ones).

The product of its (nonzero) digits is 9565938, while the sum is 63.

The square root of 999999063 is about 31622.7617864095. The cubic root of 999999063 is about 999.9996876666. Note that the first 3 decimals are identical.

The spelling of 999999063 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, sixty-three".