161113 has 4 divisors (see below), whose sum is σ = 161920. Its totient is φ = 160308.

The previous prime is 161093. The next prime is 161123. The reversal of 161113 is 311161.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 311161 = 61 ⋅5101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161113 is a prime.

It is a Duffinian number.

161113 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 161093 and 161102.

It is not an unprimeable number, because it can be changed into a prime (161123) 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, 148 + ... + 586.

It is an arithmetic number, because the mean of its divisors is an integer number (40480).

2¹⁶¹¹¹³ is an apocalyptic number.

It is an amenable number.

161113 is a deficient number, since it is larger than the sum of its proper divisors (807).

161113 is an equidigital number, since it uses as much as digits as its factorization.

161113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its digits is 18, while the sum is 13.

The square root of 161113 is about 401.3888389081. The cubic root of 161113 is about 54.4139426848.

Adding to 161113 its reverse (311161), we get a palindrome (472274).

The spelling of 161113 in words is "one hundred sixty-one thousand, one hundred thirteen".