1963998 has 12 divisors (see below), whose sum is σ = 4255368. Its totient is φ = 654660.

The previous prime is 1963981. The next prime is 1963999. The reversal of 1963998 is 8993691.

1963998 is a `hidden beast` number, since 1 + 9 + 639 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54538 + ... + 54573.

It is an arithmetic number, because the mean of its divisors is an integer number (354614).

2^1963998 is an apocalyptic number.

1963998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1963998 is an abundant number, since it is smaller than the sum of its proper divisors (2291370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1963998 is a wasteful number, since it uses less digits than its factorization.

1963998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109119 (or 109116 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1963998 is about 1401.4271297502. The cubic root of 1963998 is about 125.2315282260.

The spelling of 1963998 in words is "one million, nine hundred sixty-three thousand, nine hundred ninety-eight".