99770017 has 2 divisors, whose sum is σ = 99770018. Its totient is φ = 99770016.

The previous prime is 99769963. The next prime is 99770053. The reversal of 99770017 is 71007799.

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., 68956416 + 30813601 = 8304^2 + 5551^2 .

It is an emirp because it is prime and its reverse (71007799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99770017 is a prime.

It is not a weakly prime, because it can be changed into another prime (99777017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49885008 + 49885009.

It is an arithmetic number, because the mean of its divisors is an integer number (49885009).

Almost surely, 2^99770017 is an apocalyptic number.

It is an amenable number.

99770017 is a deficient number, since it is larger than the sum of its proper divisors (1).

99770017 is an equidigital number, since it uses as much as digits as its factorization.

99770017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 99770017 is about 9988.4942308638. The cubic root of 99770017 is about 463.8027813887.

The spelling of 99770017 in words is "ninety-nine million, seven hundred seventy thousand, seventeen".