43697643 has 8 divisors (see below), whose sum is σ = 63560256. Its totient is φ = 26483400.

The previous prime is 43697609. The next prime is 43697651. The reversal of 43697643 is 34679634.

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

It is not a de Polignac number, because 43697643 - 2⁶ = 43697579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43697595 and 43697604.

It is not an unprimeable number, because it can be changed into a prime (43697443) 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, 662053 + ... + 662118.

It is an arithmetic number, because the mean of its divisors is an integer number (7945032).

Almost surely, 2^43697643 is an apocalyptic number.

43697643 is a deficient number, since it is larger than the sum of its proper divisors (19862613).

43697643 is a wasteful number, since it uses less digits than its factorization.

43697643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324185.

The product of its digits is 326592, while the sum is 42.

The square root of 43697643 is about 6610.4192756587. The cubic root of 43697643 is about 352.2243184296.

Subtracting from 43697643 its reverse (34679634), we obtain a square (9018009 = 3003²).

The spelling of 43697643 in words is "forty-three million, six hundred ninety-seven thousand, six hundred forty-three".