99993161 has 2 divisors, whose sum is σ = 99993162. Its totient is φ = 99993160.

The previous prime is 99993119. The next prime is 99993163. The reversal of 99993161 is 16139999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99102025 + 891136 = 9955^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 99993161 - 2⁶ = 99993097 is a prime.

Together with 99993163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99993163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49996580 + 49996581.

It is an arithmetic number, because the mean of its divisors is an integer number (49996581).

Almost surely, 2^99993161 is an apocalyptic number.

It is an amenable number.

99993161 is a deficient number, since it is larger than the sum of its proper divisors (1).

99993161 is an equidigital number, since it uses as much as digits as its factorization.

99993161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 47.

The square root of 99993161 is about 9999.6580441533. The cubic root of 99993161 is about 464.1483018447.

The spelling of 99993161 in words is "ninety-nine million, nine hundred ninety-three thousand, one hundred sixty-one".