6865389 has 6 divisors (see below), whose sum is σ = 9916686. Its totient is φ = 4576920.

The previous prime is 6865381. The next prime is 6865393. The reversal of 6865389 is 9835686.

6865389 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 887364 = 2445^2 + 942^2 .

It is not a de Polignac number, because 6865389 - 2³ = 6865381 is a prime.

It is a super-2 number, since 2×6865389² = 94267132242642, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁶ + 8² + 6⁶ + 5⁸ + 3¹³ + 8⁴ + 9⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 381402 + ... + 381419.

It is an arithmetic number, because the mean of its divisors is an integer number (1652781).

Almost surely, 2^6865389 is an apocalyptic number.

It is an amenable number.

6865389 is a deficient number, since it is larger than the sum of its proper divisors (3051297).

6865389 is a wasteful number, since it uses less digits than its factorization.

6865389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762827 (or 762824 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6865389 is about 2620.1887336602. The cubic root of 6865389 is about 190.0589752289.

The spelling of 6865389 in words is "six million, eight hundred sixty-five thousand, three hundred eighty-nine".