43634961 has 12 divisors (see below), whose sum is σ = 63087492. Its totient is φ = 29062656.

The previous prime is 43634957. The next prime is 43634977. The reversal of 43634961 is 16943634.

It can be written as a sum of positive squares in 2 ways, for example, as 36978561 + 6656400 = 6081^2 + 2580^2 .

It is not a de Polignac number, because 43634961 - 2² = 43634957 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (43634861) 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 11 ways as a sum of consecutive naturals, for example, 13845 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (5257291).

Almost surely, 2^43634961 is an apocalyptic number.

It is an amenable number.

43634961 is a deficient number, since it is larger than the sum of its proper divisors (19452531).

43634961 is a wasteful number, since it uses less digits than its factorization.

43634961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560 (or 4557 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 43634961 is about 6605.6764225929. The cubic root of 43634961 is about 352.0558220053.

The spelling of 43634961 in words is "forty-three million, six hundred thirty-four thousand, nine hundred sixty-one".