6987591 has 12 divisors (see below), whose sum is σ = 10869768. Its totient is φ = 4299984.

The previous prime is 6987583. The next prime is 6987593. The reversal of 6987591 is 1957896.

It is not a de Polignac number, because 6987591 - 2³ = 6987583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987593) 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, 29745 + ... + 29978.

It is an arithmetic number, because the mean of its divisors is an integer number (905814).

Almost surely, 2^6987591 is an apocalyptic number.

6987591 is a deficient number, since it is larger than the sum of its proper divisors (3882177).

6987591 is a wasteful number, since it uses less digits than its factorization.

6987591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59742 (or 59739 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 6987591 is about 2643.4051902801. The cubic root of 6987591 is about 191.1800154034.

The spelling of 6987591 in words is "six million, nine hundred eighty-seven thousand, five hundred ninety-one".