99130181 has 2 divisors, whose sum is σ = 99130182. Its totient is φ = 99130180.

The previous prime is 99130153. The next prime is 99130259. The reversal of 99130181 is 18103199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90916225 + 8213956 = 9535^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 99130181 - 2⁶ = 99130117 is a prime.

It is a super-2 number, since 2×99130181² = 19653585570185522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99130081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49565090 + 49565091.

It is an arithmetic number, because the mean of its divisors is an integer number (49565091).

Almost surely, 2^99130181 is an apocalyptic number.

It is an amenable number.

99130181 is a deficient number, since it is larger than the sum of its proper divisors (1).

99130181 is an equidigital number, since it uses as much as digits as its factorization.

99130181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 99130181 is about 9956.4140633061. The cubic root of 99130181 is about 462.8091817244.

The spelling of 99130181 in words is "ninety-nine million, one hundred thirty thousand, one hundred eighty-one".