40365109 has 2 divisors, whose sum is σ = 40365110. Its totient is φ = 40365108.

The previous prime is 40365107. The next prime is 40365121. The reversal of 40365109 is 90156304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 4100625 = 6022^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 40365109 - 2¹ = 40365107 is a prime.

Together with 40365107, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2454571 and since 40365109 and 2454571 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40365107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20182554 + 20182555.

It is an arithmetic number, because the mean of its divisors is an integer number (20182555).

Almost surely, 2^40365109 is an apocalyptic number.

It is an amenable number.

40365109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40365109 is an equidigital number, since it uses as much as digits as its factorization.

40365109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40365109 is about 6353.3541535161. The cubic root of 40365109 is about 343.0325853665.

The spelling of 40365109 in words is "forty million, three hundred sixty-five thousand, one hundred nine".