3161971 has 4 divisors (see below), whose sum is σ = 3299472. Its totient is φ = 3024472.

The previous prime is 3161953. The next prime is 3161993. The reversal of 3161971 is 1791613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791613 = 17 ⋅105389.

It is a cyclic number.

It is not a de Polignac number, because 3161971 - 2¹⁹ = 2637683 is a prime.

It is a Duffinian number.

3161971 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68716 + ... + 68761.

It is an arithmetic number, because the mean of its divisors is an integer number (824868).

Almost surely, 2^3161971 is an apocalyptic number.

3161971 is a deficient number, since it is larger than the sum of its proper divisors (137501).

3161971 is a wasteful number, since it uses less digits than its factorization.

3161971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137500.

The product of its digits is 1134, while the sum is 28.

The square root of 3161971 is about 1778.1931841057. The cubic root of 3161971 is about 146.7751819741.

The spelling of 3161971 in words is "three million, one hundred sixty-one thousand, nine hundred seventy-one".