43794721 has 4 divisors (see below), whose sum is σ = 43853332. Its totient is φ = 43736112.

The previous prime is 43794719. The next prime is 43794733. The reversal of 43794721 is 12749734.

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 15054400 + 28740321 = 3880^2 + 5361^2 .

It is a cyclic number.

It is not a de Polignac number, because 43794721 - 2¹ = 43794719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43794521) 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, 28170 + ... + 29683.

It is an arithmetic number, because the mean of its divisors is an integer number (10963333).

Almost surely, 2^43794721 is an apocalyptic number.

It is an amenable number.

43794721 is a deficient number, since it is larger than the sum of its proper divisors (58611).

43794721 is an equidigital number, since it uses as much as digits as its factorization.

43794721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58610.

The product of its digits is 42336, while the sum is 37.

The square root of 43794721 is about 6617.7580040373. The cubic root of 43794721 is about 352.4849575259.

The spelling of 43794721 in words is "forty-three million, seven hundred ninety-four thousand, seven hundred twenty-one".