40489243 has 2 divisors, whose sum is σ = 40489244. Its totient is φ = 40489242.

The previous prime is 40489237. The next prime is 40489289. The reversal of 40489243 is 34298404.

40489243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40489243 - 2⁹ = 40488731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40489199 and 40489208.

It is not a weakly prime, because it can be changed into another prime (40189243) 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 as a sum of consecutive naturals, namely, 20244621 + 20244622.

It is an arithmetic number, because the mean of its divisors is an integer number (20244622).

Almost surely, 2^40489243 is an apocalyptic number.

40489243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40489243 is an equidigital number, since it uses as much as digits as its factorization.

40489243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 40489243 is about 6363.1158248141. The cubic root of 40489243 is about 343.3838658982.

The spelling of 40489243 in words is "forty million, four hundred eighty-nine thousand, two hundred forty-three".