161794369 has 4 divisors (see below), whose sum is σ = 176502960. Its totient is φ = 147085780.

The previous prime is 161794361. The next prime is 161794411. The reversal of 161794369 is 963497161.

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.

It is a cyclic number.

It is not a de Polignac number, because 161794369 - 2³ = 161794361 is a prime.

It is a super-2 number, since 2×161794369² = 52354835680216322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161794361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7354279 + ... + 7354300.

It is an arithmetic number, because the mean of its divisors is an integer number (44125740).

Almost surely, 2^161794369 is an apocalyptic number.

It is an amenable number.

161794369 is a deficient number, since it is larger than the sum of its proper divisors (14708591).

161794369 is a wasteful number, since it uses less digits than its factorization.

161794369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14708590.

The product of its digits is 244944, while the sum is 46.

The square root of 161794369 is about 12719.8415477552. The cubic root of 161794369 is about 544.9054281376.

The spelling of 161794369 in words is "one hundred sixty-one million, seven hundred ninety-four thousand, three hundred sixty-nine".