40091671 has 2 divisors, whose sum is σ = 40091672. Its totient is φ = 40091670.

The previous prime is 40091657. The next prime is 40091687. The reversal of 40091671 is 17619004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40091671 - 2²¹ = 37994519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40091771) 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, 20045835 + 20045836.

It is an arithmetic number, because the mean of its divisors is an integer number (20045836).

Almost surely, 2^40091671 is an apocalyptic number.

40091671 is a deficient number, since it is larger than the sum of its proper divisors (1).

40091671 is an equidigital number, since it uses as much as digits as its factorization.

40091671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 40091671 is about 6331.7984017181. The cubic root of 40091671 is about 342.2562486820.

The spelling of 40091671 in words is "forty million, ninety-one thousand, six hundred seventy-one".