43347988889 has 2 divisors, whose sum is σ = 43347988890. Its totient is φ = 43347988888.

The previous prime is 43347988847. The next prime is 43347988907. The reversal of 43347988889 is 98888974334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35101896025 + 8246092864 = 187355^2 + 90808^2 .

It is a cyclic number.

It is not a de Polignac number, because 43347988889 - 2⁸ = 43347988633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43347988829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21673994444 + 21673994445.

It is an arithmetic number, because the mean of its divisors is an integer number (21673994445).

Almost surely, 2^43347988889 is an apocalyptic number.

It is an amenable number.

43347988889 is a deficient number, since it is larger than the sum of its proper divisors (1).

43347988889 is an equidigital number, since it uses as much as digits as its factorization.

43347988889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 334430208, while the sum is 71.

The spelling of 43347988889 in words is "forty-three billion, three hundred forty-seven million, nine hundred eighty-eight thousand, eight hundred eighty-nine".