43687161 has 32 divisors (see below), whose sum is σ = 78324480. Its totient is φ = 23493888.

The previous prime is 43687123. The next prime is 43687177. The reversal of 43687161 is 16178634.

It is not a de Polignac number, because 43687161 - 2¹⁵ = 43654393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43287161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3586 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (2447640).

Almost surely, 2^43687161 is an apocalyptic number.

It is an amenable number.

43687161 is a deficient number, since it is larger than the sum of its proper divisors (34637319).

43687161 is a wasteful number, since it uses less digits than its factorization.

43687161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13630 (or 13624 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 43687161 is about 6609.6263888362. The cubic root of 43687161 is about 352.1961528330.

The spelling of 43687161 in words is "forty-three million, six hundred eighty-seven thousand, one hundred sixty-one".