43123299997 has 2 divisors, whose sum is σ = 43123299998. Its totient is φ = 43123299996.

The previous prime is 43123299959. The next prime is 43123300007. The reversal of 43123299997 is 79999232134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24614785881 + 18508514116 = 156891^2 + 136046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43123299997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43123299937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561649998 + 21561649999.

It is an arithmetic number, because the mean of its divisors is an integer number (21561649999).

Almost surely, 2^43123299997 is an apocalyptic number.

It is an amenable number.

43123299997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123299997 is an equidigital number, since it uses as much as digits as its factorization.

43123299997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 58.

The spelling of 43123299997 in words is "forty-three billion, one hundred twenty-three million, two hundred ninety-nine thousand, nine hundred ninety-seven".