40140343 has 2 divisors, whose sum is σ = 40140344. Its totient is φ = 40140342.

The previous prime is 40140341. The next prime is 40140367. The reversal of 40140343 is 34304104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40140343 - 2¹ = 40140341 is a prime.

It is a super-2 number, since 2×40140343² = 3222494272315298, which contains 22 as substring.

Together with 40140341, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40140343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40140341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20070171 + 20070172.

It is an arithmetic number, because the mean of its divisors is an integer number (20070172).

Almost surely, 2^40140343 is an apocalyptic number.

40140343 is a deficient number, since it is larger than the sum of its proper divisors (1).

40140343 is an equidigital number, since it uses as much as digits as its factorization.

40140343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40140343 is about 6335.6406937262. The cubic root of 40140343 is about 342.3946943917.

Adding to 40140343 its reverse (34304104), we get a palindrome (74444447).

The spelling of 40140343 in words is "forty million, one hundred forty thousand, three hundred forty-three".