40921207 has 2 divisors, whose sum is σ = 40921208. Its totient is φ = 40921206.

The previous prime is 40921189. The next prime is 40921217. The reversal of 40921207 is 70212904.

40921207 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 a de Polignac number, because none of the positive numbers 2^k-40921207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40921217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20460603 + 20460604.

It is an arithmetic number, because the mean of its divisors is an integer number (20460604).

Almost surely, 2^40921207 is an apocalyptic number.

40921207 is a deficient number, since it is larger than the sum of its proper divisors (1).

40921207 is an equidigital number, since it uses as much as digits as its factorization.

40921207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 40921207 is about 6396.9685789442. The cubic root of 40921207 is about 344.6006918323.

The spelling of 40921207 in words is "forty million, nine hundred twenty-one thousand, two hundred seven".