641385403 has 2 divisors, whose sum is σ = 641385404. Its totient is φ = 641385402.

The previous prime is 641385389. The next prime is 641385487. The reversal of 641385403 is 304583146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641385403 - 2¹³ = 641377211 is a prime.

It is a super-2 number, since 2×641385403² = 822750470362944818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641385803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320692701 + 320692702.

It is an arithmetic number, because the mean of its divisors is an integer number (320692702).

Almost surely, 2^641385403 is an apocalyptic number.

641385403 is a deficient number, since it is larger than the sum of its proper divisors (1).

641385403 is an equidigital number, since it uses as much as digits as its factorization.

641385403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 641385403 is about 25325.5879102539. The cubic root of 641385403 is about 862.3952529239.

The spelling of 641385403 in words is "six hundred forty-one million, three hundred eighty-five thousand, four hundred three".