40647671 has 2 divisors, whose sum is σ = 40647672. Its totient is φ = 40647670.

The previous prime is 40647667. The next prime is 40647683. The reversal of 40647671 is 17674604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40647671 - 2² = 40647667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40647071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20323835 + 20323836.

It is an arithmetic number, because the mean of its divisors is an integer number (20323836).

Almost surely, 2^40647671 is an apocalyptic number.

40647671 is a deficient number, since it is larger than the sum of its proper divisors (1).

40647671 is an equidigital number, since it uses as much as digits as its factorization.

40647671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 40647671 is about 6375.5526035003. The cubic root of 40647671 is about 343.8311519257.

The spelling of 40647671 in words is "forty million, six hundred forty-seven thousand, six hundred seventy-one".