99711917 has 2 divisors, whose sum is σ = 99711918. Its totient is φ = 99711916.

The previous prime is 99711907. The next prime is 99711949. The reversal of 99711917 is 71911799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98982601 + 729316 = 9949^2 + 854^2 .

It is a cyclic number.

It is not a de Polignac number, because 99711917 - 2⁴ = 99711901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99711907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49855958 + 49855959.

It is an arithmetic number, because the mean of its divisors is an integer number (49855959).

Almost surely, 2^99711917 is an apocalyptic number.

It is an amenable number.

99711917 is a deficient number, since it is larger than the sum of its proper divisors (1).

99711917 is an equidigital number, since it uses as much as digits as its factorization.

99711917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 44.

The square root of 99711917 is about 9985.5854610533. The cubic root of 99711917 is about 463.7127337142.

The spelling of 99711917 in words is "ninety-nine million, seven hundred eleven thousand, nine hundred seventeen".