609745 has 4 divisors (see below), whose sum is σ = 731700. Its totient is φ = 487792.

The previous prime is 609743. The next prime is 609751. The reversal of 609745 is 547906.

609745 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 156816 + 452929 = 396^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 609745 - 2¹ = 609743 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (609743) 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, 60970 + ... + 60979.

It is an arithmetic number, because the mean of its divisors is an integer number (182925).

2⁶⁰⁹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

609745 is a deficient number, since it is larger than the sum of its proper divisors (121955).

609745 is a wasteful number, since it uses less digits than its factorization.

609745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121954.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 609745 is about 780.8617035045. The cubic root of 609745 is about 84.7974415539.

The spelling of 609745 in words is "six hundred nine thousand, seven hundred forty-five".