1023608605 has 4 divisors (see below), whose sum is σ = 1228330332. Its totient is φ = 818886880.

The previous prime is 1023608591. The next prime is 1023608611. The reversal of 1023608605 is 5068063201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5068063201 = 6737 ⋅752273.

It can be written as a sum of positive squares in 2 ways, for example, as 748679044 + 274929561 = 27362^2 + 16581^2 .

It is not a de Polignac number, because 1023608605 - 2⁷ = 1023608477 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 a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102360856 + ... + 102360865.

It is an arithmetic number, because the mean of its divisors is an integer number (307082583).

Almost surely, 2^1023608605 is an apocalyptic number.

It is an amenable number.

1023608605 is a deficient number, since it is larger than the sum of its proper divisors (204721727).

1023608605 is an equidigital number, since it uses as much as digits as its factorization.

1023608605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204721726.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1023608605 is about 31993.8838686396. The cubic root of 1023608605 is about 1007.8084051137.

The spelling of 1023608605 in words is "one billion, twenty-three million, six hundred eight thousand, six hundred five".