6724989 has 12 divisors (see below), whose sum is σ = 9765756. Its totient is φ = 4459392.

The previous prime is 6724987. The next prime is 6724999. The reversal of 6724989 is 9894276.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4347225 + 2377764 = 2085^2 + 1542^2 .

It is not a de Polignac number, because 6724989 - 2¹ = 6724987 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6724981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (813813).

Almost surely, 2^6724989 is an apocalyptic number.

It is an amenable number.

6724989 is a deficient number, since it is larger than the sum of its proper divisors (3040767).

6724989 is a wasteful number, since it uses less digits than its factorization.

6724989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996 (or 3993 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 6724989 is about 2593.2583750949. The cubic root of 6724989 is about 188.7544472148.

The spelling of 6724989 in words is "six million, seven hundred twenty-four thousand, nine hundred eighty-nine".