1232261689 has 2 divisors, whose sum is σ = 1232261690. Its totient is φ = 1232261688.

The previous prime is 1232261633. The next prime is 1232261699. The reversal of 1232261689 is 9861622321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810370089 + 421891600 = 28467^2 + 20540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232261689 - 2²³ = 1223873081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232261629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616130844 + 616130845.

It is an arithmetic number, because the mean of its divisors is an integer number (616130845).

Almost surely, 2^1232261689 is an apocalyptic number.

It is an amenable number.

1232261689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232261689 is an equidigital number, since it uses as much as digits as its factorization.

1232261689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 1232261689 is about 35103.5851302969. The cubic root of 1232261689 is about 1072.0975794932.

The spelling of 1232261689 in words is "one billion, two hundred thirty-two million, two hundred sixty-one thousand, six hundred eighty-nine".