99897313 has 2 divisors, whose sum is σ = 99897314. Its totient is φ = 99897312.

The previous prime is 99897289. The next prime is 99897323. The reversal of 99897313 is 31379899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98069409 + 1827904 = 9903^2 + 1352^2 .

It is an emirp because it is prime and its reverse (31379899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99897313 - 2¹³ = 99889121 is a prime.

It is not a weakly prime, because it can be changed into another prime (99897323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49948656 + 49948657.

It is an arithmetic number, because the mean of its divisors is an integer number (49948657).

Almost surely, 2^99897313 is an apocalyptic number.

It is an amenable number.

99897313 is a deficient number, since it is larger than the sum of its proper divisors (1).

99897313 is an equidigital number, since it uses as much as digits as its factorization.

99897313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 99897313 is about 9994.8643312453. The cubic root of 99897313 is about 463.9999520041. Note that the first 4 decimals are identical.

The spelling of 99897313 in words is "ninety-nine million, eight hundred ninety-seven thousand, three hundred thirteen".