6936389 has 4 divisors (see below), whose sum is σ = 6941856. Its totient is φ = 6930924.

The previous prime is 6936367. The next prime is 6936403. The reversal of 6936389 is 9836396.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6936389 - 2¹² = 6932293 is a prime.

It is a super-2 number, since 2×6936389² = 96226984718642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6936989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272 + ... + 3734.

It is an arithmetic number, because the mean of its divisors is an integer number (1735464).

Almost surely, 2^6936389 is an apocalyptic number.

It is an amenable number.

6936389 is a deficient number, since it is larger than the sum of its proper divisors (5467).

6936389 is a wasteful number, since it uses less digits than its factorization.

6936389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466.

The product of its digits is 209952, while the sum is 44.

The square root of 6936389 is about 2633.7025268621. The cubic root of 6936389 is about 190.7119090941.

The spelling of 6936389 in words is "six million, nine hundred thirty-six thousand, three hundred eighty-nine".