403963 has 4 divisors (see below), whose sum is σ = 461680. Its totient is φ = 346248.

The previous prime is 403957. The next prime is 403969. The reversal of 403963 is 369304.

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

It is an interprime number because it is at equal distance from previous prime (403957) and next prime (403969).

It is a de Polignac number, because none of the positive numbers 2^k-403963 is a prime.

It is a super-2 number, since 2×403963² = 326372210738, which contains 22 as substring.

It is a Duffinian number.

403963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (403969) 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, 28848 + ... + 28861.

It is an arithmetic number, because the mean of its divisors is an integer number (115420).

2⁴⁰³⁹⁶³ is an apocalyptic number.

403963 is a deficient number, since it is larger than the sum of its proper divisors (57717).

403963 is an equidigital number, since it uses as much as digits as its factorization.

403963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57716.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 403963 is about 635.5808367155. The cubic root of 403963 is about 73.9231610492.

The spelling of 403963 in words is "four hundred three thousand, nine hundred sixty-three".