1232513309 has 2 divisors, whose sum is σ = 1232513310. Its totient is φ = 1232513308.

The previous prime is 1232513291. The next prime is 1232513431. The reversal of 1232513309 is 9033152321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113223225 + 119290084 = 33365^2 + 10922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232513309 - 2¹⁶ = 1232447773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232513809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616256654 + 616256655.

It is an arithmetic number, because the mean of its divisors is an integer number (616256655).

Almost surely, 2^1232513309 is an apocalyptic number.

It is an amenable number.

1232513309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232513309 is an equidigital number, since it uses as much as digits as its factorization.

1232513309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 1232513309 is about 35107.1689117764. The cubic root of 1232513309 is about 1072.1705463628.

The spelling of 1232513309 in words is "one billion, two hundred thirty-two million, five hundred thirteen thousand, three hundred nine".