408347 has 2 divisors, whose sum is σ = 408348. Its totient is φ = 408346.

The previous prime is 408341. The next prime is 408361. The reversal of 408347 is 743804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 408347 - 2⁶ = 408283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (408341) 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 as a sum of consecutive naturals, namely, 204173 + 204174.

It is an arithmetic number, because the mean of its divisors is an integer number (204174).

2⁴⁰⁸³⁴⁷ is an apocalyptic number.

408347 is a deficient number, since it is larger than the sum of its proper divisors (1).

408347 is an equidigital number, since it uses as much as digits as its factorization.

408347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 408347 is about 639.0203439641. The cubic root of 408347 is about 74.1896159816.

Subtracting from 408347 its sum of digits (26), we obtain a square (408321 = 639²).

The spelling of 408347 in words is "four hundred eight thousand, three hundred forty-seven".