403967 has 4 divisors (see below), whose sum is σ = 405240. Its totient is φ = 402696.

The previous prime is 403957. The next prime is 403969. The reversal of 403967 is 769304.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 403967 - 2⁴ = 403951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403969) 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 3 ways as a sum of consecutive naturals, for example, 284 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (101310).

2⁴⁰³⁹⁶⁷ is an apocalyptic number.

403967 is a deficient number, since it is larger than the sum of its proper divisors (1273).

403967 is an equidigital number, since it uses as much as digits as its factorization.

403967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 403967 is about 635.5839834357. The cubic root of 403967 is about 73.9234050415.

The spelling of 403967 in words is "four hundred three thousand, nine hundred sixty-seven".