6986387 has 4 divisors (see below), whose sum is σ = 7054320. Its totient is φ = 6918456.

The previous prime is 6986383. The next prime is 6986389. The reversal of 6986387 is 7836896.

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 6986387 - 2² = 6986383 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 (6986383) 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, 33812 + ... + 34017.

It is an arithmetic number, because the mean of its divisors is an integer number (1763580).

Almost surely, 2^6986387 is an apocalyptic number.

6986387 is a deficient number, since it is larger than the sum of its proper divisors (67933).

6986387 is a wasteful number, since it uses less digits than its factorization.

6986387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67932.

The product of its digits is 435456, while the sum is 47.

The square root of 6986387 is about 2643.1774439110. The cubic root of 6986387 is about 191.1690343199.

The spelling of 6986387 in words is "six million, nine hundred eighty-six thousand, three hundred eighty-seven".