43743691 has 2 divisors, whose sum is σ = 43743692. Its totient is φ = 43743690.

The previous prime is 43743659. The next prime is 43743743. The reversal of 43743691 is 19634734.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43743691 - 2⁵ = 43743659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43743691.

It is not a weakly prime, because it can be changed into another prime (43743641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21871845 + 21871846.

It is an arithmetic number, because the mean of its divisors is an integer number (21871846).

Almost surely, 2^43743691 is an apocalyptic number.

43743691 is a deficient number, since it is larger than the sum of its proper divisors (1).

43743691 is an equidigital number, since it uses as much as digits as its factorization.

43743691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 37.

The square root of 43743691 is about 6613.9013448947. The cubic root of 43743691 is about 352.3479981099.

The spelling of 43743691 in words is "forty-three million, seven hundred forty-three thousand, six hundred ninety-one".