161530839 has 12 divisors (see below), whose sum is σ = 234430872. Its totient is φ = 107175600.

The previous prime is 161530829. The next prime is 161530843. The reversal of 161530839 is 938035161.

It is a happy number.

161530839 is a `hidden beast` number, since 1 + 615 + 3 + 0 + 8 + 39 = 666.

161530839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161530839 - 2⁵ = 161530807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161530829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40632 + ... + 44429.

It is an arithmetic number, because the mean of its divisors is an integer number (19535906).

Almost surely, 2^161530839 is an apocalyptic number.

161530839 is a deficient number, since it is larger than the sum of its proper divisors (72900033).

161530839 is a wasteful number, since it uses less digits than its factorization.

161530839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85278 (or 85275 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 161530839 is about 12709.4783134478. The cubic root of 161530839 is about 544.6094207972.

The spelling of 161530839 in words is "one hundred sixty-one million, five hundred thirty thousand, eight hundred thirty-nine".