161180933 has 4 divisors (see below), whose sum is σ = 169664160. Its totient is φ = 152697708.

The previous prime is 161180879. The next prime is 161180947. The reversal of 161180933 is 339081161.

161180933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 339081161 = 71 ⋅4775791.

It is a cyclic number.

It is not a de Polignac number, because 161180933 - 2¹² = 161176837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161180933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161180953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241585 + ... + 4241622.

It is an arithmetic number, because the mean of its divisors is an integer number (42416040).

Almost surely, 2^161180933 is an apocalyptic number.

It is an amenable number.

161180933 is a deficient number, since it is larger than the sum of its proper divisors (8483227).

161180933 is an equidigital number, since it uses as much as digits as its factorization.

161180933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8483226.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 161180933 is about 12695.7052974618. The cubic root of 161180933 is about 544.2158945647.

The spelling of 161180933 in words is "one hundred sixty-one million, one hundred eighty thousand, nine hundred thirty-three".