43107989 has 2 divisors, whose sum is σ = 43107990. Its totient is φ = 43107988.

The previous prime is 43107947. The next prime is 43108069. The reversal of 43107989 is 98970134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29343889 + 13764100 = 5417^2 + 3710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43107989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43107919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21553994 + 21553995.

It is an arithmetic number, because the mean of its divisors is an integer number (21553995).

Almost surely, 2^43107989 is an apocalyptic number.

It is an amenable number.

43107989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43107989 is an equidigital number, since it uses as much as digits as its factorization.

43107989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 43107989 is about 6565.6674451270. The cubic root of 43107989 is about 350.6328387413.

The spelling of 43107989 in words is "forty-three million, one hundred seven thousand, nine hundred eighty-nine".