13243999997 has 2 divisors, whose sum is σ = 13243999998. Its totient is φ = 13243999996.

The previous prime is 13243999943. The next prime is 13244000041. The reversal of 13243999997 is 79999934231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6738932281 + 6505067716 = 82091^2 + 80654^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243999997 - 2¹⁰ = 13243998973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13243999927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6621999998 + 6621999999.

It is an arithmetic number, because the mean of its divisors is an integer number (6621999999).

Almost surely, 2^13243999997 is an apocalyptic number.

It is an amenable number.

13243999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13243999997 is an equidigital number, since it uses as much as digits as its factorization.

13243999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29760696, while the sum is 65.

The spelling of 13243999997 in words is "thirteen billion, two hundred forty-three million, nine hundred ninety-nine thousand, nine hundred ninety-seven".