3172649 has 2 divisors, whose sum is σ = 3172650. Its totient is φ = 3172648.

The previous prime is 3172627. The next prime is 3172667. The reversal of 3172649 is 9462713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2458624 + 714025 = 1568^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172649 - 2¹⁶ = 3107113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3172699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1586324 + 1586325.

It is an arithmetic number, because the mean of its divisors is an integer number (1586325).

Almost surely, 2^3172649 is an apocalyptic number.

It is an amenable number.

3172649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3172649 is an equidigital number, since it uses as much as digits as its factorization.

3172649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 3172649 is about 1781.1931394433. The cubic root of 3172649 is about 146.9402166390.

Subtracting 3172649 from its reverse (9462713), we obtain a square (6290064 = 2508²).

The spelling of 3172649 in words is "three million, one hundred seventy-two thousand, six hundred forty-nine".