43400573 has 4 divisors (see below), whose sum is σ = 43447068. Its totient is φ = 43354080.

The previous prime is 43400557. The next prime is 43400603. The reversal of 43400573 is 37500434.

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 9504889 + 33895684 = 3083^2 + 5822^2 .

It is a cyclic number.

It is not a de Polignac number, because 43400573 - 2⁴ = 43400557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43403573) 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, 21818 + ... + 23723.

It is an arithmetic number, because the mean of its divisors is an integer number (10861767).

Almost surely, 2^43400573 is an apocalyptic number.

It is an amenable number.

43400573 is a deficient number, since it is larger than the sum of its proper divisors (46495).

43400573 is an equidigital number, since it uses as much as digits as its factorization.

43400573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46494.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 43400573 is about 6587.9111256908. The cubic root of 43400573 is about 351.4243264472.

The spelling of 43400573 in words is "forty-three million, four hundred thousand, five hundred seventy-three".