641000919 has 32 divisors (see below), whose sum is σ = 954261504. Its totient is φ = 380067840.

The previous prime is 641000911. The next prime is 641000933. The reversal of 641000919 is 919000146.

It is not a de Polignac number, because 641000919 - 2³ = 641000911 is a prime.

It is a super-2 number, since 2×641000919² = 821764356317689122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641000911) 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 in 31 ways as a sum of consecutive naturals, for example, 309682 + ... + 311744.

It is an arithmetic number, because the mean of its divisors is an integer number (29820672).

Almost surely, 2^641000919 is an apocalyptic number.

641000919 is a deficient number, since it is larger than the sum of its proper divisors (313260585).

641000919 is a wasteful number, since it uses less digits than its factorization.

641000919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 641000919 is about 25317.9959514966. The cubic root of 641000919 is about 862.2228950599. Note that the first 3 decimals are identical.

The spelling of 641000919 in words is "six hundred forty-one million, nine hundred nineteen", and thus it is an aban number.