8406439 has 2 divisors, whose sum is σ = 8406440. Its totient is φ = 8406438.

The previous prime is 8406367. The next prime is 8406473. The reversal of 8406439 is 9346048.

It is an a-pointer prime, because the next prime (8406473) can be obtained adding 8406439 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8406439 - 2¹⁵ = 8373671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8406479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203219 + 4203220.

It is an arithmetic number, because the mean of its divisors is an integer number (4203220).

Almost surely, 2^8406439 is an apocalyptic number.

8406439 is a deficient number, since it is larger than the sum of its proper divisors (1).

8406439 is an equidigital number, since it uses as much as digits as its factorization.

8406439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 8406439 is about 2899.3859694770. The cubic root of 8406439 is about 203.3311991773.

The spelling of 8406439 in words is "eight million, four hundred six thousand, four hundred thirty-nine".