99981163 has 2 divisors, whose sum is σ = 99981164. Its totient is φ = 99981162.

The previous prime is 99981073. The next prime is 99981179. The reversal of 99981163 is 36118999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99981163 is a prime.

It is not a weakly prime, because it can be changed into another prime (99981863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990581 + 49990582.

It is an arithmetic number, because the mean of its divisors is an integer number (49990582).

Almost surely, 2^99981163 is an apocalyptic number.

99981163 is a deficient number, since it is larger than the sum of its proper divisors (1).

99981163 is an equidigital number, since it uses as much as digits as its factorization.

99981163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 46.

The square root of 99981163 is about 9999.0581056418. The cubic root of 99981163 is about 464.1297369948.

The spelling of 99981163 in words is "ninety-nine million, nine hundred eighty-one thousand, one hundred sixty-three".