43434220997 has 2 divisors, whose sum is σ = 43434220998. Its totient is φ = 43434220996.

The previous prime is 43434220987. The next prime is 43434221003. The reversal of 43434220997 is 79902243434.

43434220997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28331285761 + 15102935236 = 168319^2 + 122894^2 .

It is a cyclic number.

It is not a de Polignac number, because 43434220997 - 2⁸ = 43434220741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43434220937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21717110498 + 21717110499.

It is an arithmetic number, because the mean of its divisors is an integer number (21717110499).

Almost surely, 2^43434220997 is an apocalyptic number.

It is an amenable number.

43434220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43434220997 is an equidigital number, since it uses as much as digits as its factorization.

43434220997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 47.

The spelling of 43434220997 in words is "forty-three billion, four hundred thirty-four million, two hundred twenty thousand, nine hundred ninety-seven".