4609945 has 4 divisors (see below), whose sum is σ = 5531940. Its totient is φ = 3687952.

The previous prime is 4609921. The next prime is 4609949. The reversal of 4609945 is 5499064.

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 3426201 + 1183744 = 1851^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 4609945 - 2⁹ = 4609433 is a prime.

It is a super-3 number, since 3×4609945³ (a number of 21 digits) contains 333 as substring.

4609945 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4609949) 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, 460990 + ... + 460999.

It is an arithmetic number, because the mean of its divisors is an integer number (1382985).

Almost surely, 2^4609945 is an apocalyptic number.

It is an amenable number.

4609945 is a deficient number, since it is larger than the sum of its proper divisors (921995).

4609945 is an equidigital number, since it uses as much as digits as its factorization.

4609945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921994.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4609945 is about 2147.0782472933. The cubic root of 4609945 is about 166.4301155313.

The spelling of 4609945 in words is "four million, six hundred nine thousand, nine hundred forty-five".