161969738 has 8 divisors (see below), whose sum is σ = 277662432. Its totient is φ = 69415596.

The previous prime is 161969723. The next prime is 161969747. The reversal of 161969738 is 837969161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5784620 + ... + 5784647.

It is an arithmetic number, because the mean of its divisors is an integer number (34707804).

Almost surely, 2^161969738 is an apocalyptic number.

161969738 is a deficient number, since it is larger than the sum of its proper divisors (115692694).

161969738 is a wasteful number, since it uses less digits than its factorization.

161969738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11569276.

The product of its digits is 489888, while the sum is 50.

The square root of 161969738 is about 12726.7332022008. The cubic root of 161969738 is about 545.1022314745.

The spelling of 161969738 in words is "one hundred sixty-one million, nine hundred sixty-nine thousand, seven hundred thirty-eight".