7638403 has 2 divisors, whose sum is σ = 7638404. Its totient is φ = 7638402.

The previous prime is 7638401. The next prime is 7638473. The reversal of 7638403 is 3048367.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7638403 - 2¹ = 7638401 is a prime.

Together with 7638401, it forms a pair of twin primes.

7638403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7638401) 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, 3819201 + 3819202.

It is an arithmetic number, because the mean of its divisors is an integer number (3819202).

Almost surely, 2^7638403 is an apocalyptic number.

7638403 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638403 is an equidigital number, since it uses as much as digits as its factorization.

7638403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 7638403 is about 2763.7660899577. The cubic root of 7638403 is about 196.9401159596.

The spelling of 7638403 in words is "seven million, six hundred thirty-eight thousand, four hundred three".