3172891 has 4 divisors (see below), whose sum is σ = 3185784. Its totient is φ = 3160000.

The previous prime is 3172889. The next prime is 3172901. The reversal of 3172891 is 1982713.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3172891 - 2¹ = 3172889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3172801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6070 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (796446).

Almost surely, 2^3172891 is an apocalyptic number.

3172891 is a deficient number, since it is larger than the sum of its proper divisors (12893).

3172891 is a wasteful number, since it uses less digits than its factorization.

3172891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12892.

The product of its digits is 3024, while the sum is 31.

The square root of 3172891 is about 1781.2610701410. The cubic root of 3172891 is about 146.9439525947.

The spelling of 3172891 in words is "three million, one hundred seventy-two thousand, eight hundred ninety-one".