43391461 has 4 divisors (see below), whose sum is σ = 43940800. Its totient is φ = 42842124.

The previous prime is 43391449. The next prime is 43391507. The reversal of 43391461 is 16419334.

43391461 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 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 43391461 - 2²³ = 35002853 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 (43391431) 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, 274551 + ... + 274708.

It is an arithmetic number, because the mean of its divisors is an integer number (10985200).

Almost surely, 2^43391461 is an apocalyptic number.

It is an amenable number.

43391461 is a deficient number, since it is larger than the sum of its proper divisors (549339).

43391461 is an equidigital number, since it uses as much as digits as its factorization.

43391461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549338.

The product of its digits is 7776, while the sum is 31.

The square root of 43391461 is about 6587.2195196456. The cubic root of 43391461 is about 351.3997307459.

The spelling of 43391461 in words is "forty-three million, three hundred ninety-one thousand, four hundred sixty-one".