641384567 has 4 divisors (see below), whose sum is σ = 643940136. Its totient is φ = 638829000.

The previous prime is 641384533. The next prime is 641384587. The reversal of 641384567 is 765483146.

641384567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765483146 = 2 ⋅382741573.

It is a cyclic number.

It is not a de Polignac number, because 641384567 - 2¹⁴ = 641368183 is a prime.

It is a super-2 number, since 2×641384567² = 822748325571554978, 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 (641384587) 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, 1277408 + ... + 1277909.

It is an arithmetic number, because the mean of its divisors is an integer number (160985034).

Almost surely, 2^641384567 is an apocalyptic number.

641384567 is a deficient number, since it is larger than the sum of its proper divisors (2555569).

641384567 is a wasteful number, since it uses less digits than its factorization.

641384567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555568.

The product of its digits is 483840, while the sum is 44.

The square root of 641384567 is about 25325.5714052023. The cubic root of 641384567 is about 862.3948782335.

The spelling of 641384567 in words is "six hundred forty-one million, three hundred eighty-four thousand, five hundred sixty-seven".