99998497 has 2 divisors, whose sum is σ = 99998498. Its totient is φ = 99998496.

The previous prime is 99998491. The next prime is 99998513. The reversal of 99998497 is 79489999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99980001 + 18496 = 9999^2 + 136^2 .

It is an emirp because it is prime and its reverse (79489999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99998497 - 2¹⁹ = 99474209 is a prime.

It is not a weakly prime, because it can be changed into another prime (99998491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999248 + 49999249.

It is an arithmetic number, because the mean of its divisors is an integer number (49999249).

Almost surely, 2^99998497 is an apocalyptic number.

It is an amenable number.

99998497 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998497 is an equidigital number, since it uses as much as digits as its factorization.

99998497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 64.

The square root of 99998497 is about 9999.9248497176. The cubic root of 99998497 is about 464.1565579136.

It can be divided in two parts, 9999 and 8497, that added together give a square (18496 = 136²).

The spelling of 99998497 in words is "ninety-nine million, nine hundred ninety-eight thousand, four hundred ninety-seven".