641719 has 4 divisors (see below), whose sum is σ = 691096. Its totient is φ = 592344.

The previous prime is 641713. The next prime is 641747. The reversal of 641719 is 917146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917146 = 2 ⋅458573.

It is a cyclic number.

It is not a de Polignac number, because 641719 - 2¹¹ = 639671 is a prime.

It is a super-2 number, since 2×641719² = 823606549922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24669 + ... + 24694.

It is an arithmetic number, because the mean of its divisors is an integer number (172774).

2⁶⁴¹⁷¹⁹ is an apocalyptic number.

641719 is the 463-rd hex number.

641719 is a deficient number, since it is larger than the sum of its proper divisors (49377).

641719 is a wasteful number, since it uses less digits than its factorization.

641719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49376.

The product of its digits is 1512, while the sum is 28.

The square root of 641719 is about 801.0736545412. The cubic root of 641719 is about 86.2544743181.

The spelling of 641719 in words is "six hundred forty-one thousand, seven hundred nineteen".