641723677 has 8 divisors (see below), whose sum is σ = 751286592. Its totient is φ = 536632800.

The previous prime is 641723669. The next prime is 641723683. The reversal of 641723677 is 776327146.

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 641723677 - 2³ = 641723669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641723647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117699 + ... + 1118272.

It is an arithmetic number, because the mean of its divisors is an integer number (93910824).

Almost surely, 2^641723677 is an apocalyptic number.

It is an amenable number.

641723677 is a deficient number, since it is larger than the sum of its proper divisors (109562915).

641723677 is a wasteful number, since it uses less digits than its factorization.

641723677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236019.

The product of its digits is 296352, while the sum is 43.

The square root of 641723677 is about 25332.2655323206. The cubic root of 641723677 is about 862.5468386522.

The spelling of 641723677 in words is "six hundred forty-one million, seven hundred twenty-three thousand, six hundred seventy-seven".