99123161 has 2 divisors, whose sum is σ = 99123162. Its totient is φ = 99123160.

The previous prime is 99123149. The next prime is 99123173. The reversal of 99123161 is 16132199.

It is a balanced prime because it is at equal distance from previous prime (99123149) and next prime (99123173).

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 1225 = 9956^2 + 35^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99123161 is a prime.

It is not a weakly prime, because it can be changed into another prime (99123121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49561580 + 49561581.

It is an arithmetic number, because the mean of its divisors is an integer number (49561581).

Almost surely, 2^99123161 is an apocalyptic number.

It is an amenable number.

99123161 is a deficient number, since it is larger than the sum of its proper divisors (1).

99123161 is an equidigital number, since it uses as much as digits as its factorization.

99123161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 99123161 is about 9956.0615205010. The cubic root of 99123161 is about 462.7982567060.

The spelling of 99123161 in words is "ninety-nine million, one hundred twenty-three thousand, one hundred sixty-one".