40667971 has 2 divisors, whose sum is σ = 40667972. Its totient is φ = 40667970.

The previous prime is 40667903. The next prime is 40667987. The reversal of 40667971 is 17976604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40667971 - 2¹³ = 40659779 is a prime.

It is not a weakly prime, because it can be changed into another prime (40667171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20333985 + 20333986.

It is an arithmetic number, because the mean of its divisors is an integer number (20333986).

Almost surely, 2^40667971 is an apocalyptic number.

40667971 is a deficient number, since it is larger than the sum of its proper divisors (1).

40667971 is an equidigital number, since it uses as much as digits as its factorization.

40667971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 40667971 is about 6377.1444236429. The cubic root of 40667971 is about 343.8883803851. Note that the first 3 decimals are identical.

The spelling of 40667971 in words is "forty million, six hundred sixty-seven thousand, nine hundred seventy-one".