43456989 has 8 divisors (see below), whose sum is σ = 57974560. Its totient is φ = 28955376.

The previous prime is 43456969. The next prime is 43456991. The reversal of 43456989 is 98965434.

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

It is not a de Polignac number, because 43456989 - 2⁵ = 43456957 is a prime.

It is a super-2 number, since 2×43456989² = 3777019785892242, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43456909) 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, 5802 + ... + 10980.

It is an arithmetic number, because the mean of its divisors is an integer number (7246820).

Almost surely, 2^43456989 is an apocalyptic number.

It is an amenable number.

43456989 is a deficient number, since it is larger than the sum of its proper divisors (14517571).

43456989 is a wasteful number, since it uses less digits than its factorization.

43456989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7979.

The product of its digits is 933120, while the sum is 48.

The square root of 43456989 is about 6592.1915172422. The cubic root of 43456989 is about 351.5765315842.

The spelling of 43456989 in words is "forty-three million, four hundred fifty-six thousand, nine hundred eighty-nine".