161969244 has 24 divisors (see below), whose sum is σ = 380435328. Its totient is φ = 53631600.

The previous prime is 161969237. The next prime is 161969293. The reversal of 161969244 is 442969161.

It is a junction number, because it is equal to n+sod(n) for n = 161969196 and 161969205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42882 + ... + 46505.

It is an arithmetic number, because the mean of its divisors is an integer number (15851472).

Almost surely, 2^161969244 is an apocalyptic number.

It is an amenable number.

161969244 is an abundant number, since it is smaller than the sum of its proper divisors (218466084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161969244 is a wasteful number, since it uses less digits than its factorization.

161969244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89545 (or 89543 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 161969244 is about 12726.7137942204. The cubic root of 161969244 is about 545.1016772953.

The spelling of 161969244 in words is "one hundred sixty-one million, nine hundred sixty-nine thousand, two hundred forty-four".