99871963 has 2 divisors, whose sum is σ = 99871964. Its totient is φ = 99871962.

The previous prime is 99871951. The next prime is 99872011. The reversal of 99871963 is 36917899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99871963 - 2¹⁷ = 99740891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99871963.

It is not a weakly prime, because it can be changed into another prime (99871913) 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 as a sum of consecutive naturals, namely, 49935981 + 49935982.

It is an arithmetic number, because the mean of its divisors is an integer number (49935982).

Almost surely, 2^99871963 is an apocalyptic number.

99871963 is a deficient number, since it is larger than the sum of its proper divisors (1).

99871963 is an equidigital number, since it uses as much as digits as its factorization.

99871963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 99871963 is about 9993.5960995029. The cubic root of 99871963 is about 463.9607003849.

The spelling of 99871963 in words is "ninety-nine million, eight hundred seventy-one thousand, nine hundred sixty-three".