40340369 has 2 divisors, whose sum is σ = 40340370. Its totient is φ = 40340368.

The previous prime is 40340359. The next prime is 40340387. The reversal of 40340369 is 96304304.

It is a happy number.

40340369 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 can be written as a sum of positive squares in only one way, i.e., 32433025 + 7907344 = 5695^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 40340369 - 2²⁰ = 39291793 is a prime.

It is a super-2 number, since 2×40340369² = 3254690742112322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40340329) 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, 20170184 + 20170185.

It is an arithmetic number, because the mean of its divisors is an integer number (20170185).

Almost surely, 2^40340369 is an apocalyptic number.

It is an amenable number.

40340369 is a deficient number, since it is larger than the sum of its proper divisors (1).

40340369 is an equidigital number, since it uses as much as digits as its factorization.

40340369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 40340369 is about 6351.4068520289. The cubic root of 40340369 is about 342.9624888501.

The spelling of 40340369 in words is "forty million, three hundred forty thousand, three hundred sixty-nine".