43411661 has 4 divisors (see below), whose sum is σ = 44470524. Its totient is φ = 42352800.

The previous prime is 43411657. The next prime is 43411663. The reversal of 43411661 is 16611434.

43411661 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.

It can be written as a sum of positive squares in 2 ways, for example, as 19096900 + 24314761 = 4370^2 + 4931^2 .

It is a cyclic number.

It is not a de Polignac number, because 43411661 - 2² = 43411657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43411661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43411663) 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, 529370 + ... + 529451.

It is an arithmetic number, because the mean of its divisors is an integer number (11117631).

Almost surely, 2^43411661 is an apocalyptic number.

43411661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43411661 is a deficient number, since it is larger than the sum of its proper divisors (1058863).

43411661 is a wasteful number, since it uses less digits than its factorization.

43411661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058862.

The product of its digits is 1728, while the sum is 26.

The square root of 43411661 is about 6588.7526133556. The cubic root of 43411661 is about 351.4542512529.

The spelling of 43411661 in words is "forty-three million, four hundred eleven thousand, six hundred sixty-one".