9998205953 has 4 divisors (see below), whose sum is σ = 9998544468. Its totient is φ = 9997867440.

The previous prime is 9998205929. The next prime is 9998205991. The reversal of 9998205953 is 3595028999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159946609 + 9838259344 = 12647^2 + 99188^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998205953 - 2⁸ = 9998205697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9998205892 and 9998205901.

It is not an unprimeable number, because it can be changed into a prime (9998205253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120218 + ... + 185603.

It is an arithmetic number, because the mean of its divisors is an integer number (2499636117).

Almost surely, 2^9998205953 is an apocalyptic number.

It is an amenable number.

9998205953 is a deficient number, since it is larger than the sum of its proper divisors (338515).

9998205953 is a wasteful number, since it uses less digits than its factorization.

9998205953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338514.

The product of its (nonzero) digits is 7873200, while the sum is 59.

The square root of 9998205953 is about 99991.0293626383. The cubic root of 9998205953 is about 2154.3058437566.

The spelling of 9998205953 in words is "nine billion, nine hundred ninety-eight million, two hundred five thousand, nine hundred fifty-three".