39946169 has 2 divisors, whose sum is σ = 39946170. Its totient is φ = 39946168.

The previous prime is 39946139. The next prime is 39946201. The reversal of 39946169 is 96164993.

39946169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38588944 + 1357225 = 6212^2 + 1165^2 .

It is an emirp because it is prime and its reverse (96164993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39946169 is a prime.

It is a super-2 number, since 2×39946169² = 3191392835553122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39946129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19973084 + 19973085.

It is an arithmetic number, because the mean of its divisors is an integer number (19973085).

Almost surely, 2^39946169 is an apocalyptic number.

It is an amenable number.

39946169 is a deficient number, since it is larger than the sum of its proper divisors (1).

39946169 is an equidigital number, since it uses as much as digits as its factorization.

39946169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 39946169 is about 6320.2981733459. The cubic root of 39946169 is about 341.8417042706.

The spelling of 39946169 in words is "thirty-nine million, nine hundred forty-six thousand, one hundred sixty-nine".