40353491 has 2 divisors, whose sum is σ = 40353492. Its totient is φ = 40353490.

The previous prime is 40353457. The next prime is 40353493. The reversal of 40353491 is 19435304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40353491 - 2¹⁸ = 40091347 is a prime.

Together with 40353493, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 7.

It is not a weakly prime, because it can be changed into another prime (40353493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20176745 + 20176746.

It is an arithmetic number, because the mean of its divisors is an integer number (20176746).

Almost surely, 2^40353491 is an apocalyptic number.

40353491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40353491 is an equidigital number, since it uses as much as digits as its factorization.

40353491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 40353491 is about 6352.4397675224. The cubic root of 40353491 is about 342.9996713384. Note that the first 3 decimals are identical.

Adding to 40353491 its reverse (19435304), we get a palindrome (59788795).

The spelling of 40353491 in words is "forty million, three hundred fifty-three thousand, four hundred ninety-one".