43263489109 has 2 divisors, whose sum is σ = 43263489110. Its totient is φ = 43263489108.

The previous prime is 43263489053. The next prime is 43263489133. The reversal of 43263489109 is 90198436234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37230860209 + 6032628900 = 192953^2 + 77670^2 .

It is a cyclic number.

It is not a de Polignac number, because 43263489109 - 2¹¹ = 43263487061 is a prime.

It is a super-2 number, since 2×43263489109² (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 (43263489179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21631744554 + 21631744555.

It is an arithmetic number, because the mean of its divisors is an integer number (21631744555).

Almost surely, 2^43263489109 is an apocalyptic number.

It is an amenable number.

43263489109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43263489109 is an equidigital number, since it uses as much as digits as its factorization.

43263489109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 43263489109 in words is "forty-three billion, two hundred sixty-three million, four hundred eighty-nine thousand, one hundred nine".