161239943 has 2 divisors, whose sum is σ = 161239944. Its totient is φ = 161239942.

The previous prime is 161239907. The next prime is 161239957. The reversal of 161239943 is 349932161.

161239943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161239943 - 2¹² = 161235847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161239897 and 161239906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161239963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80619971 + 80619972.

It is an arithmetic number, because the mean of its divisors is an integer number (80619972).

Almost surely, 2^161239943 is an apocalyptic number.

161239943 is a deficient number, since it is larger than the sum of its proper divisors (1).

161239943 is an equidigital number, since it uses as much as digits as its factorization.

161239943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 161239943 is about 12698.0290990374. The cubic root of 161239943 is about 544.2823008098.

The spelling of 161239943 in words is "one hundred sixty-one million, two hundred thirty-nine thousand, nine hundred forty-three".