43161659 has 2 divisors, whose sum is σ = 43161660. Its totient is φ = 43161658.

The previous prime is 43161649. The next prime is 43161667. The reversal of 43161659 is 95616134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43161659 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43161649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21580829 + 21580830.

It is an arithmetic number, because the mean of its divisors is an integer number (21580830).

Almost surely, 2^43161659 is an apocalyptic number.

43161659 is a deficient number, since it is larger than the sum of its proper divisors (1).

43161659 is an equidigital number, since it uses as much as digits as its factorization.

43161659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 43161659 is about 6569.7533439240. The cubic root of 43161659 is about 350.7782925234.

The spelling of 43161659 in words is "forty-three million, one hundred sixty-one thousand, six hundred fifty-nine".