617641 has 4 divisors (see below), whose sum is σ = 634372. Its totient is φ = 600912.

The previous prime is 617587. The next prime is 617647. The reversal of 617641 is 146716.

It is a happy number.

617641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 326041 = 540^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 617641 - 2⁹ = 617129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8310 + ... + 8383.

It is an arithmetic number, because the mean of its divisors is an integer number (158593).

2⁶¹⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

617641 is a deficient number, since it is larger than the sum of its proper divisors (16731).

617641 is a wasteful number, since it uses less digits than its factorization.

617641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16730.

The product of its digits is 1008, while the sum is 25.

The square root of 617641 is about 785.9013933058. The cubic root of 617641 is about 85.1619059425.

The spelling of 617641 in words is "six hundred seventeen thousand, six hundred forty-one".