99887297 has 2 divisors, whose sum is σ = 99887298. Its totient is φ = 99887296.

The previous prime is 99887279. The next prime is 99887311. The reversal of 99887297 is 79278899.

Together with previous prime (99887279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 22429696 = 8801^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 99887297 - 2¹⁸ = 99625153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99887497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49943648 + 49943649.

It is an arithmetic number, because the mean of its divisors is an integer number (49943649).

Almost surely, 2^99887297 is an apocalyptic number.

It is an amenable number.

99887297 is a deficient number, since it is larger than the sum of its proper divisors (1).

99887297 is an equidigital number, since it uses as much as digits as its factorization.

99887297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 99887297 is about 9994.3632613589. The cubic root of 99887297 is about 463.9844441500.

The spelling of 99887297 in words is "ninety-nine million, eight hundred eighty-seven thousand, two hundred ninety-seven".