43400473 has 4 divisors (see below), whose sum is σ = 45953460. Its totient is φ = 40847488.

The previous prime is 43400449. The next prime is 43400491. The reversal of 43400473 is 37400434.

43400473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37400434 = 2 ⋅18700217.

It can be written as a sum of positive squares in 2 ways, for example, as 14531344 + 28869129 = 3812^2 + 5373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43400473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43407473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276468 + ... + 1276501.

It is an arithmetic number, because the mean of its divisors is an integer number (11488365).

Almost surely, 2^43400473 is an apocalyptic number.

It is an amenable number.

43400473 is a deficient number, since it is larger than the sum of its proper divisors (2552987).

43400473 is a wasteful number, since it uses less digits than its factorization.

43400473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552986.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 43400473 is about 6587.9035360272. The cubic root of 43400473 is about 351.4240565394.

The spelling of 43400473 in words is "forty-three million, four hundred thousand, four hundred seventy-three".