40413391 has 2 divisors, whose sum is σ = 40413392. Its totient is φ = 40413390.

The previous prime is 40413371. The next prime is 40413397. The reversal of 40413391 is 19331404.

It is a happy number.

40413391 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 40413391 - 2¹⁹ = 39889103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40413397) 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, 20206695 + 20206696.

It is an arithmetic number, because the mean of its divisors is an integer number (20206696).

Almost surely, 2^40413391 is an apocalyptic number.

40413391 is a deficient number, since it is larger than the sum of its proper divisors (1).

40413391 is an equidigital number, since it uses as much as digits as its factorization.

40413391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40413391 is about 6357.1527431705. The cubic root of 40413391 is about 343.1693016257.

Adding to 40413391 its reverse (19331404), we get a palindrome (59744795).

It can be divided in two parts, 40413 and 391, that added together give a palindrome (40804).

The spelling of 40413391 in words is "forty million, four hundred thirteen thousand, three hundred ninety-one".