1993963 has 2 divisors, whose sum is σ = 1993964. Its totient is φ = 1993962.

The previous prime is 1993949. The next prime is 1993969. The reversal of 1993963 is 3693991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1993963 - 2⁵ = 1993931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1993969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996981 + 996982.

It is an arithmetic number, because the mean of its divisors is an integer number (996982).

2^1993963 is an apocalyptic number.

1993963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993963 is an equidigital number, since it uses as much as digits as its factorization.

1993963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 40.

The square root of 1993963 is about 1412.0775474456. The cubic root of 1993963 is about 125.8652081681.

It can be divided in two parts, 19939 and 63, that added together give a palindrome (20002).

The spelling of 1993963 in words is "one million, nine hundred ninety-three thousand, nine hundred sixty-three".