393963 has 4 divisors (see below), whose sum is σ = 525288. Its totient is φ = 262640.

The previous prime is 393961. The next prime is 393977. The reversal of 393963 is 369393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 393963 - 2¹ = 393961 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (393961) 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, 65658 + ... + 65663.

It is an arithmetic number, because the mean of its divisors is an integer number (131322).

2³⁹³⁹⁶³ is an apocalyptic number.

393963 is a deficient number, since it is larger than the sum of its proper divisors (131325).

393963 is a wasteful number, since it uses less digits than its factorization.

393963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131324.

The product of its digits is 13122, while the sum is 33.

The square root of 393963 is about 627.6647194163. The cubic root of 393963 is about 73.3080744046.

The spelling of 393963 in words is "three hundred ninety-three thousand, nine hundred sixty-three".