99954181 has 2 divisors, whose sum is σ = 99954182. Its totient is φ = 99954180.

The previous prime is 99954143. The next prime is 99954223. The reversal of 99954181 is 18145999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83429956 + 16524225 = 9134^2 + 4065^2 .

It is a cyclic number.

It is not a de Polignac number, because 99954181 - 2⁷ = 99954053 is a prime.

It is a super-2 number, since 2×99954181² = 19981676598761522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99957181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49977090 + 49977091.

It is an arithmetic number, because the mean of its divisors is an integer number (49977091).

Almost surely, 2^99954181 is an apocalyptic number.

It is an amenable number.

99954181 is a deficient number, since it is larger than the sum of its proper divisors (1).

99954181 is an equidigital number, since it uses as much as digits as its factorization.

99954181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 46.

The square root of 99954181 is about 9997.7087875173. The cubic root of 99954181 is about 464.0879815451.

The spelling of 99954181 in words is "ninety-nine million, nine hundred fifty-four thousand, one hundred eighty-one".