3128969 has 4 divisors (see below), whose sum is σ = 3313044. Its totient is φ = 2944896.

The previous prime is 3128941. The next prime is 3128987. The reversal of 3128969 is 9698213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9698213 = 7 ⋅1385459.

It can be written as a sum of positive squares in 2 ways, for example, as 2930944 + 198025 = 1712^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128969 - 2¹⁶ = 3063433 is a prime.

It is a super-2 number, since 2×3128969² = 19580894005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128869) 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, 92012 + ... + 92045.

It is an arithmetic number, because the mean of its divisors is an integer number (828261).

Almost surely, 2^3128969 is an apocalyptic number.

It is an amenable number.

3128969 is a deficient number, since it is larger than the sum of its proper divisors (184075).

3128969 is a wasteful number, since it uses less digits than its factorization.

3128969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184074.

The product of its digits is 23328, while the sum is 38.

The square root of 3128969 is about 1768.8891994695. The cubic root of 3128969 is about 146.2627563325.

The spelling of 3128969 in words is "three million, one hundred twenty-eight thousand, nine hundred sixty-nine".