403949 has 16 divisors (see below), whose sum is σ = 521472. Its totient is φ = 304128.

The previous prime is 403933. The next prime is 403951. The reversal of 403949 is 949304.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 403949 - 2⁴ = 403933 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (32592).

2⁴⁰³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

403949 is a deficient number, since it is larger than the sum of its proper divisors (117523).

403949 is a wasteful number, since it uses less digits than its factorization.

403949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 403949 is about 635.5698230722. The cubic root of 403949 is about 73.9223070632.

The spelling of 403949 in words is "four hundred three thousand, nine hundred forty-nine".