43421867 has 2 divisors, whose sum is σ = 43421868. Its totient is φ = 43421866.

The previous prime is 43421857. The next prime is 43421879. The reversal of 43421867 is 76812434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43421867 - 2⁶ = 43421803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43421857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710933 + 21710934.

It is an arithmetic number, because the mean of its divisors is an integer number (21710934).

Almost surely, 2^43421867 is an apocalyptic number.

43421867 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421867 is an equidigital number, since it uses as much as digits as its factorization.

43421867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 43421867 is about 6589.5270695248. The cubic root of 43421867 is about 351.4817911730.

The spelling of 43421867 in words is "forty-three million, four hundred twenty-one thousand, eight hundred sixty-seven".