6771987 has 12 divisors (see below), whose sum is σ = 9822384. Its totient is φ = 4495920.

The previous prime is 6771979. The next prime is 6772013. The reversal of 6771987 is 7891776.

It is a happy number.

It is not a de Polignac number, because 6771987 - 2³ = 6771979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6771917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 937 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (818532).

Almost surely, 2^6771987 is an apocalyptic number.

6771987 is a deficient number, since it is larger than the sum of its proper divisors (3050397).

6771987 is a wasteful number, since it uses less digits than its factorization.

6771987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 3127 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 6771987 is about 2602.3041713067. The cubic root of 6771987 is about 189.1931342275.

The spelling of 6771987 in words is "six million, seven hundred seventy-one thousand, nine hundred eighty-seven".