43243342997 has 2 divisors, whose sum is σ = 43243342998. Its totient is φ = 43243342996.

The previous prime is 43243342991. The next prime is 43243343041. The reversal of 43243342997 is 79924334234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43037162116 + 206180881 = 207454^2 + 14359^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243342997 - 2²⁰ = 43242294421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43243342991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621671498 + 21621671499.

It is an arithmetic number, because the mean of its divisors is an integer number (21621671499).

Almost surely, 2^43243342997 is an apocalyptic number.

It is an amenable number.

43243342997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243342997 is an equidigital number, since it uses as much as digits as its factorization.

43243342997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 50.

The spelling of 43243342997 in words is "forty-three billion, two hundred forty-three million, three hundred forty-two thousand, nine hundred ninety-seven".