999990963 has 24 divisors (see below), whose sum is σ = 1542453120. Its totient is φ = 622903680.

The previous prime is 999990947. The next prime is 999990973. The reversal of 999990963 is 369099999.

It is not a de Polignac number, because 999990963 - 2⁴ = 999990947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999990963.

It is not an unprimeable number, because it can be changed into a prime (999990913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53706 + ... + 69887.

It is an arithmetic number, because the mean of its divisors is an integer number (64268880).

Almost surely, 2^999990963 is an apocalyptic number.

999990963 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

999990963 is a deficient number, since it is larger than the sum of its proper divisors (542462157).

999990963 is a wasteful number, since it uses less digits than its factorization.

999990963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123659 (or 123656 counting only the distinct ones).

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

The square root of 999990963 is about 31622.6337138449. The cubic root of 999990963 is about 999.9969876576.

The spelling of 999990963 in words is "nine hundred ninety-nine million, nine hundred ninety thousand, nine hundred sixty-three".