99641863 has 2 divisors, whose sum is σ = 99641864. Its totient is φ = 99641862.

The previous prime is 99641837. The next prime is 99641869. The reversal of 99641863 is 36814699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99641863 is a prime.

It is a super-2 number, since 2×99641863² = 19857001724221538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99641869) 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, 49820931 + 49820932.

It is an arithmetic number, because the mean of its divisors is an integer number (49820932).

Almost surely, 2^99641863 is an apocalyptic number.

99641863 is a deficient number, since it is larger than the sum of its proper divisors (1).

99641863 is an equidigital number, since it uses as much as digits as its factorization.

99641863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 99641863 is about 9982.0770884621. The cubic root of 99641863 is about 463.6041123198.

The spelling of 99641863 in words is "ninety-nine million, six hundred forty-one thousand, eight hundred sixty-three".