43631997 has 8 divisors (see below), whose sum is σ = 58206720. Its totient is φ = 29072640.

The previous prime is 43631981. The next prime is 43632023. The reversal of 43631997 is 79913634.

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

It is not a de Polignac number, because 43631997 - 2⁴ = 43631981 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43631947) 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, 8029 + ... + 12317.

It is an arithmetic number, because the mean of its divisors is an integer number (7275840).

Almost surely, 2^43631997 is an apocalyptic number.

It is an amenable number.

43631997 is a deficient number, since it is larger than the sum of its proper divisors (14574723).

43631997 is a wasteful number, since it uses less digits than its factorization.

43631997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683.

The product of its digits is 122472, while the sum is 42.

The square root of 43631997 is about 6605.4520662858. The cubic root of 43631997 is about 352.0478504380.

The spelling of 43631997 in words is "forty-three million, six hundred thirty-one thousand, nine hundred ninety-seven".