8161943 has 2 divisors, whose sum is σ = 8161944. Its totient is φ = 8161942.

The previous prime is 8161939. The next prime is 8161949. The reversal of 8161943 is 3491618.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8161943 - 2² = 8161939 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161949) 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, 4080971 + 4080972.

It is an arithmetic number, because the mean of its divisors is an integer number (4080972).

Almost surely, 2^8161943 is an apocalyptic number.

8161943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161943 is an equidigital number, since it uses as much as digits as its factorization.

8161943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 8161943 is about 2856.9114441998. The cubic root of 8161943 is about 201.3405199570.

The spelling of 8161943 in words is "eight million, one hundred sixty-one thousand, nine hundred forty-three".