1946972161 has 8 divisors (see below), whose sum is σ = 2049901920. Its totient is φ = 1844088192.

The previous prime is 1946972147. The next prime is 1946972179. The reversal of 1946972161 is 1612796491.

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 1946972161 - 2¹⁹ = 1946447873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1946972761) 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, 107766 + ... + 124528.

It is an arithmetic number, because the mean of its divisors is an integer number (256237740).

Almost surely, 2^1946972161 is an apocalyptic number.

It is an amenable number.

1946972161 is a deficient number, since it is larger than the sum of its proper divisors (102929759).

1946972161 is a wasteful number, since it uses less digits than its factorization.

1946972161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22895.

The product of its digits is 163296, while the sum is 46.

The square root of 1946972161 is about 44124.5074873363. The cubic root of 1946972161 is about 1248.6860135824.

The spelling of 1946972161 in words is "one billion, nine hundred forty-six million, nine hundred seventy-two thousand, one hundred sixty-one".