6478149 has 4 divisors (see below), whose sum is σ = 8637536. Its totient is φ = 4318764.

The previous prime is 6478117. The next prime is 6478187. The reversal of 6478149 is 9418746.

It is a happy number.

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 not a de Polignac number, because 6478149 - 2⁵ = 6478117 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478949) 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, 1079689 + ... + 1079694.

It is an arithmetic number, because the mean of its divisors is an integer number (2159384).

Almost surely, 2^6478149 is an apocalyptic number.

It is an amenable number.

6478149 is a deficient number, since it is larger than the sum of its proper divisors (2159387).

6478149 is a wasteful number, since it uses less digits than its factorization.

6478149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159386.

The product of its digits is 48384, while the sum is 39.

The square root of 6478149 is about 2545.2208155679. The cubic root of 6478149 is about 186.4161971625.

The spelling of 6478149 in words is "six million, four hundred seventy-eight thousand, one hundred forty-nine".