6457989 has 4 divisors (see below), whose sum is σ = 8610656. Its totient is φ = 4305324.

The previous prime is 6457987. The next prime is 6457991. The reversal of 6457989 is 9897546.

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.

It is an interprime number because it is at equal distance from previous prime (6457987) and next prime (6457991).

It is not a de Polignac number, because 6457989 - 2¹ = 6457987 is a prime.

It is a D-number.

It is a Duffinian number.

6457989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6457987) 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, 1076329 + ... + 1076334.

It is an arithmetic number, because the mean of its divisors is an integer number (2152664).

Almost surely, 2^6457989 is an apocalyptic number.

It is an amenable number.

6457989 is a deficient number, since it is larger than the sum of its proper divisors (2152667).

6457989 is a wasteful number, since it uses less digits than its factorization.

6457989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152666.

The product of its digits is 544320, while the sum is 48.

The square root of 6457989 is about 2541.2573659510. The cubic root of 6457989 is about 186.2226204817. Note that the first 3 decimals are identical.

The spelling of 6457989 in words is "six million, four hundred fifty-seven thousand, nine hundred eighty-nine".