40165439 has 2 divisors, whose sum is σ = 40165440. Its totient is φ = 40165438.

The previous prime is 40165409. The next prime is 40165451. The reversal of 40165439 is 93456104.

40165439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40165439 - 2¹⁶ = 40099903 is a prime.

It is a super-2 number, since 2×40165439² = 3226524980125442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40165409) 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, 20082719 + 20082720.

It is an arithmetic number, because the mean of its divisors is an integer number (20082720).

Almost surely, 2^40165439 is an apocalyptic number.

40165439 is a deficient number, since it is larger than the sum of its proper divisors (1).

40165439 is an equidigital number, since it uses as much as digits as its factorization.

40165439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 40165439 is about 6337.6209258680. The cubic root of 40165439 is about 342.4660353127.

It can be divided in two parts, 40165 and 439, that added together give a palindrome (40604).

The spelling of 40165439 in words is "forty million, one hundred sixty-five thousand, four hundred thirty-nine".