43391743 has 4 divisors (see below), whose sum is σ = 44888040. Its totient is φ = 41895448.

The previous prime is 43391729. The next prime is 43391749. The reversal of 43391743 is 34719334.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43391743 - 2¹⁷ = 43260671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43391699 and 43391708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43391749) 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, 748105 + ... + 748162.

It is an arithmetic number, because the mean of its divisors is an integer number (11222010).

Almost surely, 2^43391743 is an apocalyptic number.

43391743 is a deficient number, since it is larger than the sum of its proper divisors (1496297).

43391743 is a wasteful number, since it uses less digits than its factorization.

43391743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496296.

The product of its digits is 27216, while the sum is 34.

The square root of 43391743 is about 6587.2409246968. The cubic root of 43391743 is about 351.4004919902.

The spelling of 43391743 in words is "forty-three million, three hundred ninety-one thousand, seven hundred forty-three".