40330291 has 2 divisors, whose sum is σ = 40330292. Its totient is φ = 40330290.

The previous prime is 40330289. The next prime is 40330313. The reversal of 40330291 is 19203304.

40330291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (40330313) can be obtained adding 40330291 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40330291 - 2¹ = 40330289 is a prime.

Together with 40330289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40330231) 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, 20165145 + 20165146.

It is an arithmetic number, because the mean of its divisors is an integer number (20165146).

Almost surely, 2^40330291 is an apocalyptic number.

40330291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40330291 is an equidigital number, since it uses as much as digits as its factorization.

40330291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40330291 is about 6350.6134349368. The cubic root of 40330291 is about 342.9339263628.

Adding to 40330291 its reverse (19203304), we get a palindrome (59533595).

The spelling of 40330291 in words is "forty million, three hundred thirty thousand, two hundred ninety-one".