3171649 has 4 divisors (see below), whose sum is σ = 3415636. Its totient is φ = 2927664.

The previous prime is 3171611. The next prime is 3171653. The reversal of 3171649 is 9461713.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9461713 = 197 ⋅48029.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 2772225 = 632^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 3171649 - 2⁷ = 3171521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3171649.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3171349) 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, 121974 + ... + 121999.

It is an arithmetic number, because the mean of its divisors is an integer number (853909).

Almost surely, 2^3171649 is an apocalyptic number.

It is an amenable number.

3171649 is a deficient number, since it is larger than the sum of its proper divisors (243987).

3171649 is a wasteful number, since it uses less digits than its factorization.

3171649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243986.

The product of its digits is 4536, while the sum is 31.

The square root of 3171649 is about 1780.9124066051. The cubic root of 3171649 is about 146.9247767907.

Subtracting 3171649 from its reverse (9461713), we obtain a square (6290064 = 2508²).

The spelling of 3171649 in words is "three million, one hundred seventy-one thousand, six hundred forty-nine".