43386319909 has 2 divisors, whose sum is σ = 43386319910. Its totient is φ = 43386319908.

The previous prime is 43386319903. The next prime is 43386319931. The reversal of 43386319909 is 90991368334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35438062500 + 7948257409 = 188250^2 + 89153^2 .

It is a cyclic number.

It is not a de Polignac number, because 43386319909 - 2³ = 43386319901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43386319909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43386319901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21693159954 + 21693159955.

It is an arithmetic number, because the mean of its divisors is an integer number (21693159955).

Almost surely, 2^43386319909 is an apocalyptic number.

It is an amenable number.

43386319909 is a deficient number, since it is larger than the sum of its proper divisors (1).

43386319909 is an equidigital number, since it uses as much as digits as its factorization.

43386319909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 43386319909 in words is "forty-three billion, three hundred eighty-six million, three hundred nineteen thousand, nine hundred nine".