161835794 has 4 divisors (see below), whose sum is σ = 242753694. Its totient is φ = 80917896.

The previous prime is 161835701. The next prime is 161835803. The reversal of 161835794 is 497538161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497538161 = 19 ⋅26186219.

It can be written as a sum of positive squares in only one way, i.e., 106853569 + 54982225 = 10337^2 + 7415^2 .

It is a super-2 number, since 2×161835794² = 52381648439220872, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 40458947 + ... + 40458950.

Almost surely, 2^161835794 is an apocalyptic number.

161835794 is a deficient number, since it is larger than the sum of its proper divisors (80917900).

161835794 is an equidigital number, since it uses as much as digits as its factorization.

161835794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80917899.

The product of its digits is 181440, while the sum is 44.

The square root of 161835794 is about 12721.4698050186. The cubic root of 161835794 is about 544.9519290990.

The spelling of 161835794 in words is "one hundred sixty-one million, eight hundred thirty-five thousand, seven hundred ninety-four".