161935274 has 4 divisors (see below), whose sum is σ = 242902914. Its totient is φ = 80967636.

The previous prime is 161935253. The next prime is 161935283. The reversal of 161935274 is 472539161.

161935274 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 472539161 = 439 ⋅1076399.

It can be written as a sum of positive squares in only one way, i.e., 152893225 + 9042049 = 12365^2 + 3007^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40483817 + ... + 40483820.

Almost surely, 2^161935274 is an apocalyptic number.

161935274 is a deficient number, since it is larger than the sum of its proper divisors (80967640).

161935274 is an equidigital number, since it uses as much as digits as its factorization.

161935274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80967639.

The product of its digits is 45360, while the sum is 38.

The square root of 161935274 is about 12725.3791299120. The cubic root of 161935274 is about 545.0635663589.

The spelling of 161935274 in words is "one hundred sixty-one million, nine hundred thirty-five thousand, two hundred seventy-four".