43973361 has 20 divisors (see below), whose sum is σ = 67295844. Its totient is φ = 28598400.

The previous prime is 43973359. The next prime is 43973381. The reversal of 43973361 is 16337934.

It can be written as a sum of positive squares in 2 ways, for example, as 25310961 + 18662400 = 5031^2 + 4320^2 .

It is not a de Polignac number, because 43973361 - 2¹ = 43973359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43973381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3300 + ... + 9941.

Almost surely, 2^43973361 is an apocalyptic number.

43973361 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43973361 is a deficient number, since it is larger than the sum of its proper divisors (23322483).

43973361 is a wasteful number, since it uses less digits than its factorization.

43973361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294 (or 13285 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 43973361 is about 6631.2412865164. The cubic root of 43973361 is about 352.9635729758.

The spelling of 43973361 in words is "forty-three million, nine hundred seventy-three thousand, three hundred sixty-one".