43404993 has 6 divisors (see below), whose sum is σ = 62696114. Its totient is φ = 28936656.

The previous prime is 43404989. The next prime is 43405001. The reversal of 43404993 is 39940434.

It can be written as a sum of positive squares in only one way, i.e., 43401744 + 3249 = 6588^2 + 57^2 .

It is not a de Polignac number, because 43404993 - 2² = 43404989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43404913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2411380 + ... + 2411397.

Almost surely, 2^43404993 is an apocalyptic number.

It is an amenable number.

43404993 is a deficient number, since it is larger than the sum of its proper divisors (19291121).

43404993 is a wasteful number, since it uses less digits than its factorization.

43404993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822783 (or 4822780 counting only the distinct ones).

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

The square root of 43404993 is about 6588.2465800849. The cubic root of 43404993 is about 351.4362559579.

The spelling of 43404993 in words is "forty-three million, four hundred four thousand, nine hundred ninety-three".