43213943 has 4 divisors (see below), whose sum is σ = 43304640. Its totient is φ = 43123248.

The previous prime is 43213913. The next prime is 43213957. The reversal of 43213943 is 34931234.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43213943 - 2⁶ = 43213879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43213913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44630 + ... + 45587.

It is an arithmetic number, because the mean of its divisors is an integer number (10826160).

Almost surely, 2^43213943 is an apocalyptic number.

43213943 is a deficient number, since it is larger than the sum of its proper divisors (90697).

43213943 is an equidigital number, since it uses as much as digits as its factorization.

43213943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90696.

The product of its digits is 7776, while the sum is 29.

The square root of 43213943 is about 6573.7312844381. The cubic root of 43213943 is about 350.9198741355.

The spelling of 43213943 in words is "forty-three million, two hundred thirteen thousand, nine hundred forty-three".