40909207 has 2 divisors, whose sum is σ = 40909208. Its totient is φ = 40909206.

The previous prime is 40909199. The next prime is 40909237. The reversal of 40909207 is 70290904.

40909207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40909207 - 2³ = 40909199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40909237) 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, 20454603 + 20454604.

It is an arithmetic number, because the mean of its divisors is an integer number (20454604).

Almost surely, 2^40909207 is an apocalyptic number.

40909207 is a deficient number, since it is larger than the sum of its proper divisors (1).

40909207 is an equidigital number, since it uses as much as digits as its factorization.

40909207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 40909207 is about 6396.0305659057. The cubic root of 40909207 is about 344.5670042256.

The spelling of 40909207 in words is "forty million, nine hundred nine thousand, two hundred seven".