43404973 has 4 divisors (see below), whose sum is σ = 43426240. Its totient is φ = 43383708.

The previous prime is 43404953. The next prime is 43404983. The reversal of 43404973 is 37940434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43404973 - 2⁹ = 43404461 is a prime.

It is a super-2 number, since 2×43404973² = 3767983362261458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 7203 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (10856560).

Almost surely, 2^43404973 is an apocalyptic number.

It is an amenable number.

43404973 is a deficient number, since it is larger than the sum of its proper divisors (21267).

43404973 is a wasteful number, since it uses less digits than its factorization.

43404973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21266.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 43404973 is about 6588.2450622302. The cubic root of 43404973 is about 351.4362019800.

The spelling of 43404973 in words is "forty-three million, four hundred four thousand, nine hundred seventy-three".