161087443 has 4 divisors (see below), whose sum is σ = 175731768. Its totient is φ = 146443120.

The previous prime is 161087441. The next prime is 161087449. The reversal of 161087443 is 344780161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344780161 = 11 ⋅31343651.

It is a cyclic number.

It is not a de Polignac number, because 161087443 - 2¹ = 161087441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161087399 and 161087408.

It is not an unprimeable number, because it can be changed into a prime (161087441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7322146 + ... + 7322167.

It is an arithmetic number, because the mean of its divisors is an integer number (43932942).

Almost surely, 2^161087443 is an apocalyptic number.

161087443 is a deficient number, since it is larger than the sum of its proper divisors (14644325).

161087443 is a wasteful number, since it uses less digits than its factorization.

161087443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14644324.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 161087443 is about 12692.0228096234. The cubic root of 161087443 is about 544.1106534477.

The spelling of 161087443 in words is "one hundred sixty-one million, eighty-seven thousand, four hundred forty-three".