1232605609 has 2 divisors, whose sum is σ = 1232605610. Its totient is φ = 1232605608.

The previous prime is 1232605607. The next prime is 1232605643. The reversal of 1232605609 is 9065062321.

It is an a-pointer prime, because the next prime (1232605643) can be obtained adding 1232605609 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125938025 + 106667584 = 33555^2 + 10328^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232605609 - 2¹ = 1232605607 is a prime.

Together with 1232605607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1232605603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616302804 + 616302805.

It is an arithmetic number, because the mean of its divisors is an integer number (616302805).

Almost surely, 2^1232605609 is an apocalyptic number.

It is an amenable number.

1232605609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232605609 is an equidigital number, since it uses as much as digits as its factorization.

1232605609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1232605609 is about 35108.4834334951. The cubic root of 1232605609 is about 1072.1973097983.

It can be divided in two parts, 1232 and 605609, that added together give a square (606841 = 779²).

The spelling of 1232605609 in words is "one billion, two hundred thirty-two million, six hundred five thousand, six hundred nine".