3972647161 has 8 divisors (see below), whose sum is σ = 4543185024. Its totient is φ = 3402863520.

The previous prime is 3972647141. The next prime is 3972647213. The reversal of 3972647161 is 1617462793.

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

It is not a de Polignac number, because 3972647161 - 2¹⁹ = 3972122873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3972647111) 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, 177220 + ... + 198373.

It is an arithmetic number, because the mean of its divisors is an integer number (567898128).

Almost surely, 2^3972647161 is an apocalyptic number.

It is an amenable number.

3972647161 is a deficient number, since it is larger than the sum of its proper divisors (570537863).

3972647161 is a wasteful number, since it uses less digits than its factorization.

3972647161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377111.

The product of its digits is 381024, while the sum is 46.

The square root of 3972647161 is about 63028.9390756341. The cubic root of 3972647161 is about 1583.7744457484.

The spelling of 3972647161 in words is "three billion, nine hundred seventy-two million, six hundred forty-seven thousand, one hundred sixty-one".