6920989 has 8 divisors (see below), whose sum is σ = 7352640. Its totient is φ = 6492096.

The previous prime is 6920987. The next prime is 6921007. The reversal of 6920989 is 9890296.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6920989 - 2¹ = 6920987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6920983) 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 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 7990.

It is an arithmetic number, because the mean of its divisors is an integer number (919080).

Almost surely, 2^6920989 is an apocalyptic number.

It is an amenable number.

6920989 is a deficient number, since it is larger than the sum of its proper divisors (431651).

6920989 is a wasteful number, since it uses less digits than its factorization.

6920989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 6920989 is about 2630.7772615712. Note that the first 3 decimals coincide. The cubic root of 6920989 is about 190.5706665538.

The spelling of 6920989 in words is "six million, nine hundred twenty thousand, nine hundred eighty-nine".