641921147 has 8 divisors (see below), whose sum is σ = 734208000. Its totient is φ = 549780264.

The previous prime is 641921143. The next prime is 641921179. The reversal of 641921147 is 741129146.

641921147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 641921147 - 2² = 641921143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641921143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26897 + ... + 44802.

It is an arithmetic number, because the mean of its divisors is an integer number (91776000).

Almost surely, 2^641921147 is an apocalyptic number.

641921147 is a deficient number, since it is larger than the sum of its proper divisors (92286853).

641921147 is a wasteful number, since it uses less digits than its factorization.

641921147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72985.

The product of its digits is 12096, while the sum is 35.

The square root of 641921147 is about 25336.1628310208. The cubic root of 641921147 is about 862.6353033411.

The spelling of 641921147 in words is "six hundred forty-one million, nine hundred twenty-one thousand, one hundred forty-seven".