43889161 has 8 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 43199520.

The previous prime is 43889143. The next prime is 43889179. The reversal of 43889161 is 16198834.

It is an interprime number because it is at equal distance from previous prime (43889143) and next prime (43889179).

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 43889161 - 2⁷ = 43889033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43889101) 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, 33405 + ... + 34693.

It is an arithmetic number, because the mean of its divisors is an integer number (5572800).

Almost surely, 2^43889161 is an apocalyptic number.

It is an amenable number.

43889161 is a deficient number, since it is larger than the sum of its proper divisors (693239).

43889161 is a wasteful number, since it uses less digits than its factorization.

43889161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its digits is 41472, while the sum is 40.

The square root of 43889161 is about 6624.8895085126. The cubic root of 43889161 is about 352.7381446611.

The spelling of 43889161 in words is "forty-three million, eight hundred eighty-nine thousand, one hundred sixty-one".