161946947 has 8 divisors (see below), whose sum is σ = 171594576. Its totient is φ = 152312832.

The previous prime is 161946943. The next prime is 161947031. The reversal of 161946947 is 749649161.

161946947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 161946947 - 2² = 161946943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161946943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31928 + ... + 36650.

It is an arithmetic number, because the mean of its divisors is an integer number (21449322).

Almost surely, 2^161946947 is an apocalyptic number.

161946947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161946947 is a deficient number, since it is larger than the sum of its proper divisors (9647629).

161946947 is a wasteful number, since it uses less digits than its factorization.

161946947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757.

The product of its digits is 326592, while the sum is 47.

The square root of 161946947 is about 12725.8377720290. The cubic root of 161946947 is about 545.0766628963.

The spelling of 161946947 in words is "one hundred sixty-one million, nine hundred forty-six thousand, nine hundred forty-seven".