161794 has 4 divisors (see below), whose sum is σ = 242694. Its totient is φ = 80896.

The previous prime is 161783. The next prime is 161807. The reversal of 161794 is 497161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497161 = 7 ⋅71023.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 56169 = 325^2 + 237^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40447 + ... + 40450.

2¹⁶¹⁷⁹⁴ is an apocalyptic number.

161794 is a deficient number, since it is larger than the sum of its proper divisors (80900).

161794 is an equidigital number, since it uses as much as digits as its factorization.

161794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80899.

The product of its digits is 1512, while the sum is 28.

The square root of 161794 is about 402.2362489881. The cubic root of 161794 is about 54.4905013887.

Adding to 161794 its product of digits (1512), we get a triangular number (163306 = T₅₇₁).

It can be divided in two parts, 1617 and 94, that added together give a triangular number (1711 = T₅₈).

The spelling of 161794 in words is "one hundred sixty-one thousand, seven hundred ninety-four".