6398549 has 4 divisors (see below), whose sum is σ = 6414240. Its totient is φ = 6382860.

The previous prime is 6398543. The next prime is 6398551. The reversal of 6398549 is 9458936.

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 6398549 - 2¹⁶ = 6333013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398543) 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, 7217 + ... + 8054.

It is an arithmetic number, because the mean of its divisors is an integer number (1603560).

Almost surely, 2^6398549 is an apocalyptic number.

It is an amenable number.

6398549 is a deficient number, since it is larger than the sum of its proper divisors (15691).

6398549 is a wasteful number, since it uses less digits than its factorization.

6398549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15690.

The product of its digits is 233280, while the sum is 44.

The square root of 6398549 is about 2529.5353328230. The cubic root of 6398549 is about 185.6495211478.

The spelling of 6398549 in words is "six million, three hundred ninety-eight thousand, five hundred forty-nine".