998396953 has 4 divisors (see below), whose sum is σ = 1005684660. Its totient is φ = 991109248.

The previous prime is 998396951. The next prime is 998396969. The reversal of 998396953 is 359693899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359693899 = 31 ⋅11603029.

It can be written as a sum of positive squares in 2 ways, for example, as 813219289 + 185177664 = 28517^2 + 13608^2 .

It is a cyclic number.

It is not a de Polignac number, because 998396953 - 2¹ = 998396951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998396891 and 998396900.

It is not an unprimeable number, because it can be changed into a prime (998396951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643648 + ... + 3643921.

It is an arithmetic number, because the mean of its divisors is an integer number (251421165).

Almost surely, 2^998396953 is an apocalyptic number.

It is an amenable number.

998396953 is a deficient number, since it is larger than the sum of its proper divisors (7287707).

998396953 is a wasteful number, since it uses less digits than its factorization.

998396953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7287706.

The product of its digits is 14171760, while the sum is 61.

The square root of 998396953 is about 31597.4200370853. The cubic root of 998396953 is about 999.4653652166.

The spelling of 998396953 in words is "nine hundred ninety-eight million, three hundred ninety-six thousand, nine hundred fifty-three".