43404961 has 4 divisors (see below), whose sum is σ = 45958212. Its totient is φ = 40851712.

The previous prime is 43404953. The next prime is 43404983. The reversal of 43404961 is 16940434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38825361 + 4579600 = 6231^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 43404961 - 2³ = 43404953 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43404901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276600 + ... + 1276633.

It is an arithmetic number, because the mean of its divisors is an integer number (11489553).

Almost surely, 2^43404961 is an apocalyptic number.

It is an amenable number.

43404961 is a deficient number, since it is larger than the sum of its proper divisors (2553251).

43404961 is a wasteful number, since it uses less digits than its factorization.

43404961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553250.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43404961 is about 6588.2441515172. The cubic root of 43404961 is about 351.4361695933.

The spelling of 43404961 in words is "forty-three million, four hundred four thousand, nine hundred sixty-one".