963993 has 4 divisors (see below), whose sum is σ = 1285328. Its totient is φ = 642660.

The previous prime is 963979. The next prime is 964009. The reversal of 963993 is 399369.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 963993 - 2⁹ = 963481 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (963913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160663 + ... + 160668.

It is an arithmetic number, because the mean of its divisors is an integer number (321332).

2⁹⁶³⁹⁹³ is an apocalyptic number.

It is an amenable number.

963993 is a deficient number, since it is larger than the sum of its proper divisors (321335).

963993 is a wasteful number, since it uses less digits than its factorization.

963993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321334.

The product of its digits is 39366, while the sum is 39.

The square root of 963993 is about 981.8314519305. The cubic root of 963993 is about 98.7850657928.

The spelling of 963993 in words is "nine hundred sixty-three thousand, nine hundred ninety-three".