161338 has 4 divisors (see below), whose sum is σ = 242010. Its totient is φ = 80668.

The previous prime is 161333. The next prime is 161339. The reversal of 161338 is 833161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154449 + 6889 = 393^2 + 83^2 .

It is not an unprimeable number, because it can be changed into a prime (161333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40333 + ... + 40336.

2¹⁶¹³³⁸ is an apocalyptic number.

161338 is a deficient number, since it is larger than the sum of its proper divisors (80672).

161338 is an equidigital number, since it uses as much as digits as its factorization.

161338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80671.

The product of its digits is 432, while the sum is 22.

The square root of 161338 is about 401.6690179738. The cubic root of 161338 is about 54.4392612339.

Adding to 161338 its reverse (833161), we get a palindrome (994499).

The spelling of 161338 in words is "one hundred sixty-one thousand, three hundred thirty-eight".