605123653 has 4 divisors (see below), whose sum is σ = 640719180. Its totient is φ = 569528128.

The previous prime is 605123639. The next prime is 605123671. The reversal of 605123653 is 356321506.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 356321506 = 2 ⋅178160753.

It can be written as a sum of positive squares in 2 ways, for example, as 277622244 + 327501409 = 16662^2 + 18097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605123653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605123683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17797738 + ... + 17797771.

It is an arithmetic number, because the mean of its divisors is an integer number (160179795).

Almost surely, 2^605123653 is an apocalyptic number.

It is an amenable number.

605123653 is a deficient number, since it is larger than the sum of its proper divisors (35595527).

605123653 is a wasteful number, since it uses less digits than its factorization.

605123653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35595526.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 605123653 is about 24599.2612287442. The cubic root of 605123653 is about 845.8266727574.

The spelling of 605123653 in words is "six hundred five million, one hundred twenty-three thousand, six hundred fifty-three".