43138357989 has 16 divisors (see below), whose sum is σ = 58042625472. Its totient is φ = 28497547008.

The previous prime is 43138357987. The next prime is 43138357991. The reversal of 43138357989 is 98975383134.

It is an interprime number because it is at equal distance from previous prime (43138357987) and next prime (43138357991).

It is not a de Polignac number, because 43138357989 - 2¹ = 43138357987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43138357987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33907 + ... + 295679.

It is an arithmetic number, because the mean of its divisors is an integer number (3627664092).

Almost surely, 2^43138357989 is an apocalyptic number.

It is an amenable number.

43138357989 is a deficient number, since it is larger than the sum of its proper divisors (14904267483).

43138357989 is a wasteful number, since it uses less digits than its factorization.

43138357989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262276.

The product of its digits is 19595520, while the sum is 60.

The spelling of 43138357989 in words is "forty-three billion, one hundred thirty-eight million, three hundred fifty-seven thousand, nine hundred eighty-nine".