43106209997 has 2 divisors, whose sum is σ = 43106209998. Its totient is φ = 43106209996.

The previous prime is 43106209981. The next prime is 43106210003. The reversal of 43106209997 is 79990260134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32008430281 + 11097779716 = 178909^2 + 105346^2 .

It is a cyclic number.

It is not a de Polignac number, because 43106209997 - 2⁴ = 43106209981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43106209697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21553104998 + 21553104999.

It is an arithmetic number, because the mean of its divisors is an integer number (21553104999).

Almost surely, 2^43106209997 is an apocalyptic number.

It is an amenable number.

43106209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43106209997 is an equidigital number, since it uses as much as digits as its factorization.

43106209997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 43106209997 in words is "forty-three billion, one hundred six million, two hundred nine thousand, nine hundred ninety-seven".