6725989 has 4 divisors (see below), whose sum is σ = 6731424. Its totient is φ = 6720556.

The previous prime is 6725987. The next prime is 6726023. The reversal of 6725989 is 9895276.

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 6725989 - 2¹ = 6725987 is a prime.

It is a Duffinian number.

6725989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6725987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144 + ... + 3670.

It is an arithmetic number, because the mean of its divisors is an integer number (1682856).

Almost surely, 2^6725989 is an apocalyptic number.

It is an amenable number.

6725989 is a deficient number, since it is larger than the sum of its proper divisors (5435).

6725989 is a wasteful number, since it uses less digits than its factorization.

6725989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434.

The product of its digits is 272160, while the sum is 46.

The square root of 6725989 is about 2593.4511755574. The cubic root of 6725989 is about 188.7638026250.

The spelling of 6725989 in words is "six million, seven hundred twenty-five thousand, nine hundred eighty-nine".