40353923 has 2 divisors, whose sum is σ = 40353924. Its totient is φ = 40353922.

The previous prime is 40353919. The next prime is 40353947. The reversal of 40353923 is 32935304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40353923 - 2² = 40353919 is a prime.

It is not a weakly prime, because it can be changed into another prime (40353323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20176961 + 20176962.

It is an arithmetic number, because the mean of its divisors is an integer number (20176962).

Almost surely, 2^40353923 is an apocalyptic number.

40353923 is a deficient number, since it is larger than the sum of its proper divisors (1).

40353923 is an equidigital number, since it uses as much as digits as its factorization.

40353923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 40353923 is about 6352.4737701151. The cubic root of 40353923 is about 343.0008953162. Note that the first 3 decimals are identical.

The spelling of 40353923 in words is "forty million, three hundred fifty-three thousand, nine hundred twenty-three".