6837989 has 4 divisors (see below), whose sum is σ = 6997056. Its totient is φ = 6678924.

The previous prime is 6837977. The next prime is 6838001. The reversal of 6837989 is 9897386.

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: 9897386 = 2 ⋅4948693.

It is an interprime number because it is at equal distance from previous prime (6837977) and next prime (6838001).

It is a cyclic number.

It is not a de Polignac number, because 6837989 - 2⁴ = 6837973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6833989) 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, 79469 + ... + 79554.

It is an arithmetic number, because the mean of its divisors is an integer number (1749264).

Almost surely, 2^6837989 is an apocalyptic number.

It is an amenable number.

6837989 is a deficient number, since it is larger than the sum of its proper divisors (159067).

6837989 is a wasteful number, since it uses less digits than its factorization.

6837989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159066.

The product of its digits is 653184, while the sum is 50.

The square root of 6837989 is about 2614.9548753277. The cubic root of 6837989 is about 189.8057941760.

The spelling of 6837989 in words is "six million, eight hundred thirty-seven thousand, nine hundred eighty-nine".