1023266605 has 4 divisors (see below), whose sum is σ = 1227919932. Its totient is φ = 818613280.

The previous prime is 1023266599. The next prime is 1023266611. The reversal of 1023266605 is 5066623201.

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

It is an interprime number because it is at equal distance from previous prime (1023266599) and next prime (1023266611).

It can be written as a sum of positive squares in 2 ways, for example, as 380796196 + 642470409 = 19514^2 + 25347^2 .

It is not a de Polignac number, because 1023266605 - 2³ = 1023266597 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, 102326656 + ... + 102326665.

It is an arithmetic number, because the mean of its divisors is an integer number (306979983).

Almost surely, 2^1023266605 is an apocalyptic number.

It is an amenable number.

1023266605 is a deficient number, since it is larger than the sum of its proper divisors (204653327).

1023266605 is an equidigital number, since it uses as much as digits as its factorization.

1023266605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204653326.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1023266605 is about 31988.5386505855. The cubic root of 1023266605 is about 1007.6961522903.

Adding to 1023266605 its reverse (5066623201), we get a palindrome (6089889806).

The spelling of 1023266605 in words is "one billion, twenty-three million, two hundred sixty-six thousand, six hundred five".