43608522109 has 2 divisors, whose sum is σ = 43608522110. Its totient is φ = 43608522108.

The previous prime is 43608522101. The next prime is 43608522149. The reversal of 43608522109 is 90122580634.

It is an a-pointer prime, because the next prime (43608522149) can be obtained adding 43608522109 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35686988100 + 7921534009 = 188910^2 + 89003^2 .

It is a cyclic number.

It is not a de Polignac number, because 43608522109 - 2³ = 43608522101 is a prime.

It is a super-2 number, since 2×43608522109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43608522101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21804261054 + 21804261055.

It is an arithmetic number, because the mean of its divisors is an integer number (21804261055).

Almost surely, 2^43608522109 is an apocalyptic number.

It is an amenable number.

43608522109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43608522109 is an equidigital number, since it uses as much as digits as its factorization.

43608522109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 43608522109 in words is "forty-three billion, six hundred eight million, five hundred twenty-two thousand, one hundred nine".