161105493 has 8 divisors (see below), whose sum is σ = 216893248. Its totient is φ = 106360704.

The previous prime is 161105491. The next prime is 161105521. The reversal of 161105493 is 394501161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161105493 - 2¹ = 161105491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161105493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161105491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260380 + ... + 260997.

It is an arithmetic number, because the mean of its divisors is an integer number (27111656).

Almost surely, 2^161105493 is an apocalyptic number.

It is an amenable number.

161105493 is a deficient number, since it is larger than the sum of its proper divisors (55787755).

161105493 is a wasteful number, since it uses less digits than its factorization.

161105493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521483.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 161105493 is about 12692.7338662717. The cubic root of 161105493 is about 544.1309753928.

The spelling of 161105493 in words is "one hundred sixty-one million, one hundred five thousand, four hundred ninety-three".