641767147 has 8 divisors (see below), whose sum is σ = 740569856. Its totient is φ = 544744872.

The previous prime is 641767141. The next prime is 641767157. The reversal of 641767147 is 741767146.

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

It is not a de Polignac number, because 641767147 - 2¹⁹ = 641242859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641767141) 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, 444333 + ... + 445774.

It is an arithmetic number, because the mean of its divisors is an integer number (92571232).

Almost surely, 2^641767147 is an apocalyptic number.

641767147 is a deficient number, since it is larger than the sum of its proper divisors (98802709).

641767147 is a wasteful number, since it uses less digits than its factorization.

641767147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890217.

The product of its digits is 197568, while the sum is 43.

The square root of 641767147 is about 25333.1235144820. The cubic root of 641767147 is about 862.5663143579.

Subtracting 641767147 from its reverse (741767146), we obtain a palindrome (99999999).

The spelling of 641767147 in words is "six hundred forty-one million, seven hundred sixty-seven thousand, one hundred forty-seven".