43494091 has 2 divisors, whose sum is σ = 43494092. Its totient is φ = 43494090.

The previous prime is 43494083. The next prime is 43494133. The reversal of 43494091 is 19049434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43494091 - 2³ = 43494083 is a prime.

It is not a weakly prime, because it can be changed into another prime (43494001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21747045 + 21747046.

It is an arithmetic number, because the mean of its divisors is an integer number (21747046).

Almost surely, 2^43494091 is an apocalyptic number.

43494091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43494091 is an equidigital number, since it uses as much as digits as its factorization.

43494091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 43494091 is about 6595.0050037889. The cubic root of 43494091 is about 351.6765575509.

The spelling of 43494091 in words is "forty-three million, four hundred ninety-four thousand, ninety-one".