8420407 has 2 divisors, whose sum is σ = 8420408. Its totient is φ = 8420406.

The previous prime is 8420393. The next prime is 8420413. The reversal of 8420407 is 7040248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8420407 - 2¹¹ = 8418359 is a prime.

8420407 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8420207) 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, 4210203 + 4210204.

It is an arithmetic number, because the mean of its divisors is an integer number (4210204).

Almost surely, 2^8420407 is an apocalyptic number.

8420407 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420407 is an equidigital number, since it uses as much as digits as its factorization.

8420407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 8420407 is about 2901.7937555933. The cubic root of 8420407 is about 203.4437541130.

The spelling of 8420407 in words is "eight million, four hundred twenty thousand, four hundred seven".