99817397 has 2 divisors, whose sum is σ = 99817398. Its totient is φ = 99817396.

The previous prime is 99817351. The next prime is 99817423. The reversal of 99817397 is 79371899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 31820881 = 8246^2 + 5641^2 .

It is a cyclic number.

It is not a de Polignac number, because 99817397 - 2²² = 95623093 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 (99817097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49908698 + 49908699.

It is an arithmetic number, because the mean of its divisors is an integer number (49908699).

Almost surely, 2^99817397 is an apocalyptic number.

It is an amenable number.

99817397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99817397 is an equidigital number, since it uses as much as digits as its factorization.

99817397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 53.

The square root of 99817397 is about 9990.8656782083. The cubic root of 99817397 is about 463.8761885397.

The spelling of 99817397 in words is "ninety-nine million, eight hundred seventeen thousand, three hundred ninety-seven".