609641 has 2 divisors, whose sum is σ = 609642. Its totient is φ = 609640.

The previous prime is 609619. The next prime is 609673. The reversal of 609641 is 146906.

609641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577600 + 32041 = 760^2 + 179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 609641.

It is not a weakly prime, because it can be changed into another prime (609601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304820 + 304821.

It is an arithmetic number, because the mean of its divisors is an integer number (304821).

2⁶⁰⁹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

609641 is a deficient number, since it is larger than the sum of its proper divisors (1).

609641 is an equidigital number, since it uses as much as digits as its factorization.

609641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 609641 is about 780.7951075666. The cubic root of 609641 is about 84.7926201748.

The spelling of 609641 in words is "six hundred nine thousand, six hundred forty-one".