39961171 has 2 divisors, whose sum is σ = 39961172. Its totient is φ = 39961170.

The previous prime is 39961153. The next prime is 39961193. The reversal of 39961171 is 17116993.

It is a weak prime.

It is an emirp because it is prime and its reverse (17116993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39961171 - 2¹¹ = 39959123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39961171.

It is not a weakly prime, because it can be changed into another prime (39961111) 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, 19980585 + 19980586.

It is an arithmetic number, because the mean of its divisors is an integer number (19980586).

Almost surely, 2^39961171 is an apocalyptic number.

39961171 is a deficient number, since it is larger than the sum of its proper divisors (1).

39961171 is an equidigital number, since it uses as much as digits as its factorization.

39961171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 39961171 is about 6321.4848730342. The cubic root of 39961171 is about 341.8844924155.

The spelling of 39961171 in words is "thirty-nine million, nine hundred sixty-one thousand, one hundred seventy-one".