161169273 has 12 divisors (see below), whose sum is σ = 234102960. Its totient is φ = 106844856.

The previous prime is 161169271. The next prime is 161169311. The reversal of 161169273 is 372961161.

It is not a de Polignac number, because 161169273 - 2¹ = 161169271 is a prime.

It is a super-3 number, since 3×161169273³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161169271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48411 + ... + 51632.

It is an arithmetic number, because the mean of its divisors is an integer number (19508580).

Almost surely, 2^161169273 is an apocalyptic number.

It is an amenable number.

161169273 is a deficient number, since it is larger than the sum of its proper divisors (72933687).

161169273 is a wasteful number, since it uses less digits than its factorization.

161169273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100228 (or 100225 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 161169273 is about 12695.2460787493. The cubic root of 161169273 is about 544.2027711961.

The spelling of 161169273 in words is "one hundred sixty-one million, one hundred sixty-nine thousand, two hundred seventy-three".