406939 has 8 divisors (see below), whose sum is σ = 457632. Its totient is φ = 359040.

The previous prime is 406907. The next prime is 406951. The reversal of 406939 is 939604.

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

It is a cyclic number.

It is not a de Polignac number, because 406939 - 2⁵ = 406907 is a prime.

It is a Duffinian number.

406939 is a lucky number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 406939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406969) 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 7 ways as a sum of consecutive naturals, for example, 382 + ... + 979.

It is an arithmetic number, because the mean of its divisors is an integer number (57204).

2⁴⁰⁶⁹³⁹ is an apocalyptic number.

406939 is a deficient number, since it is larger than the sum of its proper divisors (50693).

406939 is a wasteful number, since it uses less digits than its factorization.

406939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 406939 is about 637.9177062913. The cubic root of 406939 is about 74.1042480064.

The spelling of 406939 in words is "four hundred six thousand, nine hundred thirty-nine".