9999953963 has 2 divisors, whose sum is σ = 9999953964. Its totient is φ = 9999953962.

The previous prime is 9999953947. The next prime is 9999953987. The reversal of 9999953963 is 3693599999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999953963 - 2⁴ = 9999953947 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999955963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999976981 + 4999976982.

It is an arithmetic number, because the mean of its divisors is an integer number (4999976982).

Almost surely, 2^9999953963 is an apocalyptic number.

9999953963 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999953963 is an equidigital number, since it uses as much as digits as its factorization.

9999953963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143489070, while the sum is 71.

The square root of 9999953963 is about 99999.7698147351. The cubic root of 9999953963 is about 2154.4313839031.

The spelling of 9999953963 in words is "nine billion, nine hundred ninety-nine million, nine hundred fifty-three thousand, nine hundred sixty-three".