40646147 has 2 divisors, whose sum is σ = 40646148. Its totient is φ = 40646146.

The previous prime is 40646141. The next prime is 40646161. The reversal of 40646147 is 74164604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40646147 - 2¹² = 40642051 is a prime.

It is not a weakly prime, because it can be changed into another prime (40646141) 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, 20323073 + 20323074.

It is an arithmetic number, because the mean of its divisors is an integer number (20323074).

Almost surely, 2^40646147 is an apocalyptic number.

40646147 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646147 is an equidigital number, since it uses as much as digits as its factorization.

40646147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 40646147 is about 6375.4330833285. The cubic root of 40646147 is about 343.8268547937.

The spelling of 40646147 in words is "forty million, six hundred forty-six thousand, one hundred forty-seven".