43312240997 has 2 divisors, whose sum is σ = 43312240998. Its totient is φ = 43312240996.

The previous prime is 43312240987. The next prime is 43312241003. The reversal of 43312240997 is 79904221334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33269395201 + 10042845796 = 182399^2 + 100214^2 .

It is a cyclic number.

It is not a de Polignac number, because 43312240997 - 2¹⁰ = 43312239973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43312240987) 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, 21656120498 + 21656120499.

It is an arithmetic number, because the mean of its divisors is an integer number (21656120499).

Almost surely, 2^43312240997 is an apocalyptic number.

It is an amenable number.

43312240997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43312240997 is an equidigital number, since it uses as much as digits as its factorization.

43312240997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 43312240997 in words is "forty-three billion, three hundred twelve million, two hundred forty thousand, nine hundred ninety-seven".