6406489 has 4 divisors (see below), whose sum is σ = 6685056. Its totient is φ = 6127924.

The previous prime is 6406483. The next prime is 6406493. The reversal of 6406489 is 9846046.

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 a cyclic number.

It is not a de Polignac number, because 6406489 - 2⁵ = 6406457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406483) 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, 139249 + ... + 139294.

It is an arithmetic number, because the mean of its divisors is an integer number (1671264).

Almost surely, 2^6406489 is an apocalyptic number.

It is an amenable number.

6406489 is a deficient number, since it is larger than the sum of its proper divisors (278567).

6406489 is a wasteful number, since it uses less digits than its factorization.

6406489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278566.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6406489 is about 2531.1043044489. The cubic root of 6406489 is about 185.7262806285.

The spelling of 6406489 in words is "six million, four hundred six thousand, four hundred eighty-nine".