1998324953 has 16 divisors (see below), whose sum is σ = 2120927760. Its totient is φ = 1879449600.

The previous prime is 1998324941. The next prime is 1998324967. The reversal of 1998324953 is 3594238991.

It can be written as a sum of positive squares in 8 ways, for example, as 270010624 + 1728314329 = 16432^2 + 41573^2 .

It is a cyclic number.

It is not a de Polignac number, because 1998324953 - 2³⁰ = 924583129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1998324895 and 1998324904.

It is not an unprimeable number, because it can be changed into a prime (1998324983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446323 + ... + 1447703.

It is an arithmetic number, because the mean of its divisors is an integer number (132557985).

Almost surely, 2^1998324953 is an apocalyptic number.

It is an amenable number.

1998324953 is a deficient number, since it is larger than the sum of its proper divisors (122602807).

1998324953 is a wasteful number, since it uses less digits than its factorization.

1998324953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668.

The product of its digits is 2099520, while the sum is 53.

The square root of 1998324953 is about 44702.6280323652. The cubic root of 1998324953 is about 1259.5692138238.

The spelling of 1998324953 in words is "one billion, nine hundred ninety-eight million, three hundred twenty-four thousand, nine hundred fifty-three".