1998022313 has 8 divisors (see below), whose sum is σ = 2284195200. Its totient is φ = 1712034720.

The previous prime is 1998022297. The next prime is 1998022331. The reversal of 1998022313 is 3132208991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1998022313 - 2⁴ = 1998022297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1998022363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22388 + ... + 67061.

It is an arithmetic number, because the mean of its divisors is an integer number (285524400).

Almost surely, 2^1998022313 is an apocalyptic number.

It is an amenable number.

1998022313 is a deficient number, since it is larger than the sum of its proper divisors (286172887).

1998022313 is an equidigital number, since it uses as much as digits as its factorization.

1998022313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92647.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1998022313 is about 44699.2428683082. The cubic root of 1998022313 is about 1259.5056246877.

The spelling of 1998022313 in words is "one billion, nine hundred ninety-eight million, twenty-two thousand, three hundred thirteen".