8409403 has 2 divisors, whose sum is σ = 8409404. Its totient is φ = 8409402.

The previous prime is 8409383. The next prime is 8409409. The reversal of 8409403 is 3049048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8409403 - 2⁹ = 8408891 is a prime.

It is not a weakly prime, because it can be changed into another prime (8409409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204701 + 4204702.

It is an arithmetic number, because the mean of its divisors is an integer number (4204702).

Almost surely, 2^8409403 is an apocalyptic number.

8409403 is a deficient number, since it is larger than the sum of its proper divisors (1).

8409403 is an equidigital number, since it uses as much as digits as its factorization.

8409403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8409403 is about 2899.8970671388. The cubic root of 8409403 is about 203.3550936728.

The spelling of 8409403 in words is "eight million, four hundred nine thousand, four hundred three".