43040623 has 4 divisors (see below), whose sum is σ = 43062768. Its totient is φ = 43018480.

The previous prime is 43040609. The next prime is 43040653. The reversal of 43040623 is 32604034.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43040623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43040594 and 43040603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43040603) 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, 7843 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (10765692).

Almost surely, 2^43040623 is an apocalyptic number.

43040623 is a deficient number, since it is larger than the sum of its proper divisors (22145).

43040623 is a wasteful number, since it uses less digits than its factorization.

43040623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22144.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 43040623 is about 6560.5352677964. The cubic root of 43040623 is about 350.4500957641.

Adding to 43040623 its reverse (32604034), we get a palindrome (75644657).

The spelling of 43040623 in words is "forty-three million, forty thousand, six hundred twenty-three".