1998263 has 8 divisors (see below), whose sum is σ = 2099328. Its totient is φ = 1898424.

The previous prime is 1998257. The next prime is 1998277. The reversal of 1998263 is 3628991.

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 1998263 - 2¹⁴ = 1981879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998223) 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, 6356 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (262416).

2^1998263 is an apocalyptic number.

1998263 is a deficient number, since it is larger than the sum of its proper divisors (101065).

1998263 is a wasteful number, since it uses less digits than its factorization.

1998263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

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

The square root of 1998263 is about 1413.5993067344. The cubic root of 1998263 is about 125.9556197106.

The spelling of 1998263 in words is "one million, nine hundred ninety-eight thousand, two hundred sixty-three".