99615161 has 2 divisors, whose sum is σ = 99615162. Its totient is φ = 99615160.

The previous prime is 99615083. The next prime is 99615163. The reversal of 99615161 is 16151699.

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., 55591936 + 44023225 = 7456^2 + 6635^2 .

It is an emirp because it is prime and its reverse (16151699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99615161 - 2¹⁴ = 99598777 is a prime.

It is a Sophie Germain prime.

Together with 99615163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99615163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49807580 + 49807581.

It is an arithmetic number, because the mean of its divisors is an integer number (49807581).

Almost surely, 2^99615161 is an apocalyptic number.

It is an amenable number.

99615161 is a deficient number, since it is larger than the sum of its proper divisors (1).

99615161 is an equidigital number, since it uses as much as digits as its factorization.

99615161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 38.

The square root of 99615161 is about 9980.7395016602. The cubic root of 99615161 is about 463.5626964510.

The spelling of 99615161 in words is "ninety-nine million, six hundred fifteen thousand, one hundred sixty-one".