161869292 has 24 divisors (see below), whose sum is σ = 305531856. Its totient is φ = 74593728.

The previous prime is 161869289. The next prime is 161869307. The reversal of 161869292 is 292968161.

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 in 7 ways as a sum of consecutive naturals, for example, 38183 + ... + 42209.

It is an arithmetic number, because the mean of its divisors is an integer number (12730494).

Almost surely, 2^161869292 is an apocalyptic number.

It is an amenable number.

161869292 is a deficient number, since it is larger than the sum of its proper divisors (143662564).

161869292 is a wasteful number, since it uses less digits than its factorization.

161869292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817 (or 4815 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 161869292 is about 12722.7863300458. The cubic root of 161869292 is about 544.9895259329.

The spelling of 161869292 in words is "one hundred sixty-one million, eight hundred sixty-nine thousand, two hundred ninety-two".