43396891 has 2 divisors, whose sum is σ = 43396892. Its totient is φ = 43396890.

The previous prime is 43396879. The next prime is 43396907. The reversal of 43396891 is 19869334.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43396891 - 2¹⁷ = 43265819 is a prime.

It is not a weakly prime, because it can be changed into another prime (43396391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21698445 + 21698446.

It is an arithmetic number, because the mean of its divisors is an integer number (21698446).

Almost surely, 2^43396891 is an apocalyptic number.

43396891 is a deficient number, since it is larger than the sum of its proper divisors (1).

43396891 is an equidigital number, since it uses as much as digits as its factorization.

43396891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 43396891 is about 6587.6316685134. The cubic root of 43396891 is about 351.4143881685.

The spelling of 43396891 in words is "forty-three million, three hundred ninety-six thousand, eight hundred ninety-one".