7640903 has 2 divisors, whose sum is σ = 7640904. Its totient is φ = 7640902.

The previous prime is 7640887. The next prime is 7640909. The reversal of 7640903 is 3090467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7640903 - 2⁴ = 7640887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7640909) 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, 3820451 + 3820452.

It is an arithmetic number, because the mean of its divisors is an integer number (3820452).

Almost surely, 2^7640903 is an apocalyptic number.

7640903 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640903 is an equidigital number, since it uses as much as digits as its factorization.

7640903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 7640903 is about 2764.2183343578. The cubic root of 7640903 is about 196.9615993589.

Subtracting from 7640903 its product of nonzero digits (4536), we obtain a palindrome (7636367).

The spelling of 7640903 in words is "seven million, six hundred forty thousand, nine hundred three".