161682943 has 2 divisors, whose sum is σ = 161682944. Its totient is φ = 161682942.

The previous prime is 161682919. The next prime is 161682947. The reversal of 161682943 is 349286161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161682943 - 2²¹ = 159585791 is a prime.

It is a super-2 number, since 2×161682943² = 52282748114282498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161682896 and 161682905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161682947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80841471 + 80841472.

It is an arithmetic number, because the mean of its divisors is an integer number (80841472).

Almost surely, 2^161682943 is an apocalyptic number.

161682943 is a deficient number, since it is larger than the sum of its proper divisors (1).

161682943 is an equidigital number, since it uses as much as digits as its factorization.

161682943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 161682943 is about 12715.4607859881. The cubic root of 161682943 is about 544.7803092882.

The spelling of 161682943 in words is "one hundred sixty-one million, six hundred eighty-two thousand, nine hundred forty-three".