99216857 has 2 divisors, whose sum is σ = 99216858. Its totient is φ = 99216856.

The previous prime is 99216851. The next prime is 99216889. The reversal of 99216857 is 75861299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98982601 + 234256 = 9949^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 99216857 - 2¹⁴ = 99200473 is a prime.

It is not a weakly prime, because it can be changed into another prime (99216851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49608428 + 49608429.

It is an arithmetic number, because the mean of its divisors is an integer number (49608429).

Almost surely, 2^99216857 is an apocalyptic number.

It is an amenable number.

99216857 is a deficient number, since it is larger than the sum of its proper divisors (1).

99216857 is an equidigital number, since it uses as much as digits as its factorization.

99216857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 99216857 is about 9960.7658842079. The cubic root of 99216857 is about 462.9440305408.

The spelling of 99216857 in words is "ninety-nine million, two hundred sixteen thousand, eight hundred fifty-seven".