43738691 has 2 divisors, whose sum is σ = 43738692. Its totient is φ = 43738690.

The previous prime is 43738679. The next prime is 43738733. The reversal of 43738691 is 19683734.

43738691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43738691 - 2¹⁸ = 43476547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43738601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21869345 + 21869346.

It is an arithmetic number, because the mean of its divisors is an integer number (21869346).

Almost surely, 2^43738691 is an apocalyptic number.

43738691 is a deficient number, since it is larger than the sum of its proper divisors (1).

43738691 is an equidigital number, since it uses as much as digits as its factorization.

43738691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 43738691 is about 6613.5233423645. The cubic root of 43738691 is about 352.3345728816.

The spelling of 43738691 in words is "forty-three million, seven hundred thirty-eight thousand, six hundred ninety-one".