99876181 has 2 divisors, whose sum is σ = 99876182. Its totient is φ = 99876180.

The previous prime is 99876167. The next prime is 99876211. The reversal of 99876181 is 18167899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99321156 + 555025 = 9966^2 + 745^2 .

It is an emirp because it is prime and its reverse (18167899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99876181 - 2⁷ = 99876053 is a prime.

It is a super-2 number, since 2×99876181² = 19950503062289522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99876781) 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, 49938090 + 49938091.

It is an arithmetic number, because the mean of its divisors is an integer number (49938091).

Almost surely, 2^99876181 is an apocalyptic number.

It is an amenable number.

99876181 is a deficient number, since it is larger than the sum of its proper divisors (1).

99876181 is an equidigital number, since it uses as much as digits as its factorization.

99876181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 49.

The square root of 99876181 is about 9993.8071324196. The cubic root of 99876181 is about 463.9672319433.

The spelling of 99876181 in words is "ninety-nine million, eight hundred seventy-six thousand, one hundred eighty-one".