403728643 has 2 divisors, whose sum is σ = 403728644. Its totient is φ = 403728642.

The previous prime is 403728629. The next prime is 403728659. The reversal of 403728643 is 346827304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403728643 is a prime.

It is not a weakly prime, because it can be changed into another prime (403728673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201864321 + 201864322.

It is an arithmetic number, because the mean of its divisors is an integer number (201864322).

Almost surely, 2^403728643 is an apocalyptic number.

403728643 is a deficient number, since it is larger than the sum of its proper divisors (1).

403728643 is an equidigital number, since it uses as much as digits as its factorization.

403728643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 403728643 is about 20092.9998506943. Note that the first 3 decimals coincide. The cubic root of 403728643 is about 739.0886290673.

The spelling of 403728643 in words is "four hundred three million, seven hundred twenty-eight thousand, six hundred forty-three".