1997963 has 8 divisors (see below), whose sum is σ = 2238960. Its totient is φ = 1766880.

The previous prime is 1997939. The next prime is 1997969. The reversal of 1997963 is 3697991.

It is a happy number.

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 1997963 - 2⁶ = 1997899 is a prime.

It is a super-2 number, since 2×1997963² = 7983712298738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (279870).

2^1997963 is an apocalyptic number.

1997963 is a deficient number, since it is larger than the sum of its proper divisors (240997).

1997963 is a wasteful number, since it uses less digits than its factorization.

1997963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957.

The product of its digits is 91854, while the sum is 44.

The square root of 1997963 is about 1413.4931906451. The cubic root of 1997963 is about 125.9493161397.

The spelling of 1997963 in words is "one million, nine hundred ninety-seven thousand, nine hundred sixty-three".