3172989 has 4 divisors (see below), whose sum is σ = 4230656. Its totient is φ = 2115324.

The previous prime is 3172987. The next prime is 3172991. The reversal of 3172989 is 9892713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9892713 = 3 ⋅3297571.

It is an interprime number because it is at equal distance from previous prime (3172987) and next prime (3172991).

It is not a de Polignac number, because 3172989 - 2¹ = 3172987 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 1 + 7³ + 2¹⁹ + 9² + 8⁷ + 9⁶ .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3172987) 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, 528829 + ... + 528834.

It is an arithmetic number, because the mean of its divisors is an integer number (1057664).

Almost surely, 2^3172989 is an apocalyptic number.

It is an amenable number.

3172989 is a deficient number, since it is larger than the sum of its proper divisors (1057667).

3172989 is a wasteful number, since it uses less digits than its factorization.

3172989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057666.

The product of its digits is 27216, while the sum is 39.

The square root of 3172989 is about 1781.2885785296. The cubic root of 3172989 is about 146.9454654484.

The spelling of 3172989 in words is "three million, one hundred seventy-two thousand, nine hundred eighty-nine".