99999998513 has 2 divisors, whose sum is σ = 99999998514. Its totient is φ = 99999998512.

The previous prime is 99999998509. The next prime is 99999998573. The reversal of 99999998513 is 31589999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96775121569 + 3224876944 = 311087^2 + 56788^2 .

It is an emirp because it is prime and its reverse (31589999999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99999998513 - 2² = 99999998509 is a prime.

It is a super-2 number, since 2×99999998513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99999998573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999999256 + 49999999257.

It is an arithmetic number, because the mean of its divisors is an integer number (49999999257).

Almost surely, 2^99999998513 is an apocalyptic number.

It is an amenable number.

99999998513 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999998513 is an equidigital number, since it uses as much as digits as its factorization.

99999998513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573956280, while the sum is 80.

The spelling of 99999998513 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, five hundred thirteen".