1213565429 has 2 divisors, whose sum is σ = 1213565430. Its totient is φ = 1213565428.

The previous prime is 1213565369. The next prime is 1213565477. The reversal of 1213565429 is 9245653121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184942929 + 28622500 = 34423^2 + 5350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213565429 - 2⁸ = 1213565173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213565392 and 1213565401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213565329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606782714 + 606782715.

It is an arithmetic number, because the mean of its divisors is an integer number (606782715).

Almost surely, 2^1213565429 is an apocalyptic number.

It is an amenable number.

1213565429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213565429 is an equidigital number, since it uses as much as digits as its factorization.

1213565429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 1213565429 is about 34836.2660025440. The cubic root of 1213565429 is about 1066.6478575568.

The spelling of 1213565429 in words is "one billion, two hundred thirteen million, five hundred sixty-five thousand, four hundred twenty-nine".