998513 has 2 divisors, whose sum is σ = 998514.
Its totient is φ = 998512.
The previous prime is 998497. The next prime is 998527. The reversal of 998513 is 315899.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 628849 + 369664 = 793^2 + 608^2
It is an emirp because it is prime and its reverse (315899) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 998513 - 24 = 998497 is a prime.
It is a super-2 number, since 2×9985132 = 1994056422338, which contains 22 as substring.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998513.
It is not a weakly prime, because it can be changed into another prime (998213) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499256 + 499257.
It is an arithmetic number, because the mean of its divisors is an integer number (499257).
2998513 is an apocalyptic number.
It is an amenable number.
998513 is a deficient number, since it is larger than the sum of its proper divisors (1).
998513 is an equidigital number, since it uses as much as digits as its factorization.
998513 is an evil number, because the sum of its binary digits is even.
The product of its digits is 9720, while the sum is 35.
The square root of 998513 is about 999.2562233982.
The cubic root of 998513 is about 99.9504087445.
The spelling of 998513 in words is "nine hundred ninety-eight thousand, five hundred thirteen".