99922817 has 2 divisors, whose sum is σ = 99922818. Its totient is φ = 99922816.

The previous prime is 99922789. The next prime is 99922871. The reversal of 99922817 is 71822999.

It is a happy number.

Together with next prime (99922871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94167616 + 5755201 = 9704^2 + 2399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99922817 is a prime.

It is not a weakly prime, because it can be changed into another prime (99922877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49961408 + 49961409.

It is an arithmetic number, because the mean of its divisors is an integer number (49961409).

Almost surely, 2^99922817 is an apocalyptic number.

It is an amenable number.

99922817 is a deficient number, since it is larger than the sum of its proper divisors (1).

99922817 is an equidigital number, since it uses as much as digits as its factorization.

99922817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 99922817 is about 9996.1401050606. The cubic root of 99922817 is about 464.0394353745.

The spelling of 99922817 in words is "ninety-nine million, nine hundred twenty-two thousand, eight hundred seventeen".