99161917 has 2 divisors, whose sum is σ = 99161918. Its totient is φ = 99161916.

The previous prime is 99161879. The next prime is 99161927. The reversal of 99161917 is 71916199.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82791801 + 16370116 = 9099^2 + 4046^2 .

It is a cyclic number.

It is not a de Polignac number, because 99161917 - 2⁷ = 99161789 is a prime.

It is a super-2 number, since 2×99161917² = 19666171566229778, which contains 22 as substring.

It is equal to p_5715979 and since 99161917 and 5715979 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99161927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49580958 + 49580959.

It is an arithmetic number, because the mean of its divisors is an integer number (49580959).

Almost surely, 2^99161917 is an apocalyptic number.

It is an amenable number.

99161917 is a deficient number, since it is larger than the sum of its proper divisors (1).

99161917 is an equidigital number, since it uses as much as digits as its factorization.

99161917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 43.

The square root of 99161917 is about 9958.0076822626. The cubic root of 99161917 is about 462.8585650872.

The spelling of 99161917 in words is "ninety-nine million, one hundred sixty-one thousand, nine hundred seventeen".