43681969 has 8 divisors (see below), whose sum is σ = 46630080. Its totient is φ = 40798800.

The previous prime is 43681951. The next prime is 43681999. The reversal of 43681969 is 96918634.

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 43681969 - 2¹⁵ = 43649201 is a prime.

It is a super-2 number, since 2×43681969² = 3816228831433922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43681919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14842 + ... + 17539.

It is an arithmetic number, because the mean of its divisors is an integer number (5828760).

Almost surely, 2^43681969 is an apocalyptic number.

It is an amenable number.

43681969 is a deficient number, since it is larger than the sum of its proper divisors (2948111).

43681969 is a wasteful number, since it uses less digits than its factorization.

43681969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32471.

The product of its digits is 279936, while the sum is 46.

The square root of 43681969 is about 6609.2336166911. The cubic root of 43681969 is about 352.1822000314.

The spelling of 43681969 in words is "forty-three million, six hundred eighty-one thousand, nine hundred sixty-nine".