6881487 has 4 divisors (see below), whose sum is σ = 9175320. Its totient is φ = 4587656.

The previous prime is 6881461. The next prime is 6881489. The reversal of 6881487 is 7841886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6881487 - 2⁷ = 6881359 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881489) 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, 1146912 + ... + 1146917.

It is an arithmetic number, because the mean of its divisors is an integer number (2293830).

Almost surely, 2^6881487 is an apocalyptic number.

6881487 is a deficient number, since it is larger than the sum of its proper divisors (2293833).

6881487 is a wasteful number, since it uses less digits than its factorization.

6881487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293832.

The product of its digits is 86016, while the sum is 42.

The square root of 6881487 is about 2623.2588511239. The cubic root of 6881487 is about 190.2074096987.

The spelling of 6881487 in words is "six million, eight hundred eighty-one thousand, four hundred eighty-seven".