40691207 has 2 divisors, whose sum is σ = 40691208. Its totient is φ = 40691206.

The previous prime is 40691159. The next prime is 40691219. The reversal of 40691207 is 70219604.

40691207 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 40691207 - 2¹⁸ = 40429063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40691207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40691267) 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, 20345603 + 20345604.

It is an arithmetic number, because the mean of its divisors is an integer number (20345604).

Almost surely, 2^40691207 is an apocalyptic number.

40691207 is a deficient number, since it is larger than the sum of its proper divisors (1).

40691207 is an equidigital number, since it uses as much as digits as its factorization.

40691207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 40691207 is about 6378.9659820382. The cubic root of 40691207 is about 343.9538624575.

The spelling of 40691207 in words is "forty million, six hundred ninety-one thousand, two hundred seven".