6864149 has 4 divisors (see below), whose sum is σ = 7225440. Its totient is φ = 6502860.

The previous prime is 6864139. The next prime is 6864167. The reversal of 6864149 is 9414686.

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 an emirpimes, since its reverse is a distinct semiprime: 9414686 = 2 ⋅4707343.

It is a cyclic number.

It is not a de Polignac number, because 6864149 - 2⁸ = 6863893 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 (6864139) 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, 180617 + ... + 180654.

It is an arithmetic number, because the mean of its divisors is an integer number (1806360).

Almost surely, 2^6864149 is an apocalyptic number.

It is an amenable number.

6864149 is a deficient number, since it is larger than the sum of its proper divisors (361291).

6864149 is a wasteful number, since it uses less digits than its factorization.

6864149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361290.

The product of its digits is 41472, while the sum is 38.

The square root of 6864149 is about 2619.9520987988. The cubic root of 6864149 is about 190.0475319677.

The spelling of 6864149 in words is "six million, eight hundred sixty-four thousand, one hundred forty-nine".