43966421 has 8 divisors (see below), whose sum is σ = 44815584. Its totient is φ = 43121520.

The previous prime is 43966357. The next prime is 43966427. The reversal of 43966421 is 12466934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43966421 - 2⁶ = 43966357 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 (43966427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26210 + ... + 27836.

It is an arithmetic number, because the mean of its divisors is an integer number (5601948).

Almost surely, 2^43966421 is an apocalyptic number.

It is an amenable number.

43966421 is a deficient number, since it is larger than the sum of its proper divisors (849163).

43966421 is a wasteful number, since it uses less digits than its factorization.

43966421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131.

The product of its digits is 31104, while the sum is 35.

The square root of 43966421 is about 6630.7179852562. The cubic root of 43966421 is about 352.9450034296.

The spelling of 43966421 in words is "forty-three million, nine hundred sixty-six thousand, four hundred twenty-one".