8403963 has 8 divisors (see below), whose sum is σ = 11466048. Its totient is φ = 5472264.

The previous prime is 8403959. The next prime is 8403977. The reversal of 8403963 is 3693048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8403963 - 2² = 8403959 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8403943) 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, 32445 + ... + 32702.

It is an arithmetic number, because the mean of its divisors is an integer number (1433256).

Almost surely, 2^8403963 is an apocalyptic number.

8403963 is a deficient number, since it is larger than the sum of its proper divisors (3062085).

8403963 is a wasteful number, since it uses less digits than its factorization.

8403963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65193.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 8403963 is about 2898.9589510719. The cubic root of 8403963 is about 203.3112344223.

Subtracting from 8403963 its reverse (3693048), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 8403963 in words is "eight million, four hundred three thousand, nine hundred sixty-three".