43791641 has 2 divisors, whose sum is σ = 43791642. Its totient is φ = 43791640.

The previous prime is 43791611. The next prime is 43791647. The reversal of 43791641 is 14619734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32535616 + 11256025 = 5704^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 43791641 - 2⁶ = 43791577 is a prime.

It is not a weakly prime, because it can be changed into another prime (43791647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21895820 + 21895821.

It is an arithmetic number, because the mean of its divisors is an integer number (21895821).

Almost surely, 2^43791641 is an apocalyptic number.

It is an amenable number.

43791641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43791641 is an equidigital number, since it uses as much as digits as its factorization.

43791641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 43791641 is about 6617.5252927359. The cubic root of 43791641 is about 352.4766941317.

The spelling of 43791641 in words is "forty-three million, seven hundred ninety-one thousand, six hundred forty-one".