99897289 has 2 divisors, whose sum is σ = 99897290. Its totient is φ = 99897288.

The previous prime is 99897277. The next prime is 99897313. The reversal of 99897289 is 98279899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 12194064 = 9365^2 + 3492^2 .

It is a cyclic number.

It is not a de Polignac number, because 99897289 - 2¹¹ = 99895241 is a prime.

It is not a weakly prime, because it can be changed into another prime (99847289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49948644 + 49948645.

It is an arithmetic number, because the mean of its divisors is an integer number (49948645).

Almost surely, 2^99897289 is an apocalyptic number.

It is an amenable number.

99897289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99897289 is an equidigital number, since it uses as much as digits as its factorization.

99897289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 61.

The square root of 99897289 is about 9994.8631306287. The cubic root of 99897289 is about 463.9999148459. Note that the first 4 decimals are identical.

The spelling of 99897289 in words is "ninety-nine million, eight hundred ninety-seven thousand, two hundred eighty-nine".