8638403 has 2 divisors, whose sum is σ = 8638404. Its totient is φ = 8638402.

The previous prime is 8638381. The next prime is 8638411. The reversal of 8638403 is 3048368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8638403 - 2⁶ = 8638339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8638403.

It is not a weakly prime, because it can be changed into another prime (8638453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319201 + 4319202.

It is an arithmetic number, because the mean of its divisors is an integer number (4319202).

Almost surely, 2^8638403 is an apocalyptic number.

8638403 is a deficient number, since it is larger than the sum of its proper divisors (1).

8638403 is an equidigital number, since it uses as much as digits as its factorization.

8638403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 8638403 is about 2939.1160235690. The cubic root of 8638403 is about 205.1844700833.

The spelling of 8638403 in words is "eight million, six hundred thirty-eight thousand, four hundred three".