641384587 has 2 divisors, whose sum is σ = 641384588. Its totient is φ = 641384586.

The previous prime is 641384533. The next prime is 641384617. The reversal of 641384587 is 785483146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641384587 - 2¹⁵ = 641351819 is a prime.

It is a super-2 number, since 2×641384587² = 822748376882321138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641384287) 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, 320692293 + 320692294.

It is an arithmetic number, because the mean of its divisors is an integer number (320692294).

Almost surely, 2^641384587 is an apocalyptic number.

641384587 is a deficient number, since it is larger than the sum of its proper divisors (1).

641384587 is an equidigital number, since it uses as much as digits as its factorization.

641384587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 641384587 is about 25325.5718000601. The cubic root of 641384587 is about 862.3948871974.

The spelling of 641384587 in words is "six hundred forty-one million, three hundred eighty-four thousand, five hundred eighty-seven".