641519 has 2 divisors, whose sum is σ = 641520. Its totient is φ = 641518.

The previous prime is 641513. The next prime is 641521. The reversal of 641519 is 915146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641519 - 2¹² = 637423 is a prime.

It is a super-8 number, since 8×641519⁸ (a number of 48 digits) contains 88888888 as substring. Note that it is a super-d number also for d = 2.

Together with 641521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641513) 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, 320759 + 320760.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

2⁶⁴¹⁵¹⁹ is an apocalyptic number.

641519 is a deficient number, since it is larger than the sum of its proper divisors (1).

641519 is an equidigital number, since it uses as much as digits as its factorization.

641519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 641519 is about 800.9488123470. The cubic root of 641519 is about 86.2455126140.

The spelling of 641519 in words is "six hundred forty-one thousand, five hundred nineteen".