641682693 has 6 divisors (see below), whose sum is σ = 926875014. Its totient is φ = 427788456.

The previous prime is 641682689. The next prime is 641682709. The reversal of 641682693 is 396286146.

641682693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 637158564 + 4524129 = 25242^2 + 2127^2 .

It is not a de Polignac number, because 641682693 - 2² = 641682689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641682653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35649030 + ... + 35649047.

It is an arithmetic number, because the mean of its divisors is an integer number (154479169).

Almost surely, 2^641682693 is an apocalyptic number.

It is an amenable number.

641682693 is a deficient number, since it is larger than the sum of its proper divisors (285192321).

641682693 is a wasteful number, since it uses less digits than its factorization.

641682693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71298083 (or 71298080 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 641682693 is about 25331.4565905713. The cubic root of 641682693 is about 862.5284759344.

The spelling of 641682693 in words is "six hundred forty-one million, six hundred eighty-two thousand, six hundred ninety-three".