43345091 has 2 divisors, whose sum is σ = 43345092. Its totient is φ = 43345090.

The previous prime is 43345069. The next prime is 43345151. The reversal of 43345091 is 19054334.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43345091 - 2¹⁴ = 43328707 is a prime.

It is not a weakly prime, because it can be changed into another prime (43345021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21672545 + 21672546.

It is an arithmetic number, because the mean of its divisors is an integer number (21672546).

Almost surely, 2^43345091 is an apocalyptic number.

43345091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43345091 is an equidigital number, since it uses as much as digits as its factorization.

43345091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 43345091 is about 6583.6988843658. The cubic root of 43345091 is about 351.2745124588.

The spelling of 43345091 in words is "forty-three million, three hundred forty-five thousand, ninety-one".