641627929 has 8 divisors (see below), whose sum is σ = 698688000. Its totient is φ = 586896912.

The previous prime is 641627893. The next prime is 641627953. The reversal of 641627929 is 929726146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641627929 - 2¹⁵ = 641595161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641627029) 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 7 ways as a sum of consecutive naturals, for example, 581689 + ... + 582790.

It is an arithmetic number, because the mean of its divisors is an integer number (87336000).

Almost surely, 2^641627929 is an apocalyptic number.

It is an amenable number.

641627929 is a deficient number, since it is larger than the sum of its proper divisors (57060071).

641627929 is a wasteful number, since it uses less digits than its factorization.

641627929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164527.

The product of its digits is 326592, while the sum is 46.

The square root of 641627929 is about 25330.3756190073. The cubic root of 641627929 is about 862.5039379222.

The spelling of 641627929 in words is "six hundred forty-one million, six hundred twenty-seven thousand, nine hundred twenty-nine".