40320043 has 2 divisors, whose sum is σ = 40320044. Its totient is φ = 40320042.

The previous prime is 40320041. The next prime is 40320053. The reversal of 40320043 is 34002304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40320043 - 2¹ = 40320041 is a prime.

Together with 40320041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40319999 and 40320026.

It is not a weakly prime, because it can be changed into another prime (40320041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160021 + 20160022.

It is an arithmetic number, because the mean of its divisors is an integer number (20160022).

Almost surely, 2^40320043 is an apocalyptic number.

40320043 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320043 is an equidigital number, since it uses as much as digits as its factorization.

40320043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 40320043 is about 6349.8065324859. The cubic root of 40320043 is about 342.9048771915.

Adding to 40320043 its reverse (34002304), we get a palindrome (74322347).

The spelling of 40320043 in words is "forty million, three hundred twenty thousand, forty-three".