1243320233429 has 2 divisors, whose sum is σ = 1243320233430. Its totient is φ = 1243320233428.

The previous prime is 1243320233411. The next prime is 1243320233443. The reversal of 1243320233429 is 9243320233421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 879346930225 + 363973303204 = 937735^2 + 603302^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243320233429 - 2⁸ = 1243320233173 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 = 1243320233392 and 1243320233401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243320233329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621660116714 + 621660116715.

It is an arithmetic number, because the mean of its divisors is an integer number (621660116715).

Almost surely, 2^{1243320233429} is an apocalyptic number.

It is an amenable number.

1243320233429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243320233429 is an equidigital number, since it uses as much as digits as its factorization.

1243320233429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 38.

The spelling of 1243320233429 in words is "one trillion, two hundred forty-three billion, three hundred twenty million, two hundred thirty-three thousand, four hundred twenty-nine".