642802003 has 2 divisors, whose sum is σ = 642802004. Its totient is φ = 642802002.

The previous prime is 642802001. The next prime is 642802021. The reversal of 642802003 is 300208246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642802003 - 2¹ = 642802001 is a prime.

Together with 642802001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (642802001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321401001 + 321401002.

It is an arithmetic number, because the mean of its divisors is an integer number (321401002).

Almost surely, 2^642802003 is an apocalyptic number.

642802003 is a deficient number, since it is larger than the sum of its proper divisors (1).

642802003 is an equidigital number, since it uses as much as digits as its factorization.

642802003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 642802003 is about 25353.5402458907. The cubic root of 642802003 is about 863.0296976721.

The spelling of 642802003 in words is "six hundred forty-two million, eight hundred two thousand, three".