6987151 has 4 divisors (see below), whose sum is σ = 6993400. Its totient is φ = 6980904.

The previous prime is 6987139. The next prime is 6987163. The reversal of 6987151 is 1517896.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (6987139) and next prime (6987163).

It is a cyclic number.

It is not a de Polignac number, because 6987151 - 2¹⁵ = 6954383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6987151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987251) 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, 936 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (1748350).

Almost surely, 2^6987151 is an apocalyptic number.

6987151 is a deficient number, since it is larger than the sum of its proper divisors (6249).

6987151 is a wasteful number, since it uses less digits than its factorization.

6987151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6248.

The product of its digits is 15120, while the sum is 37.

The square root of 6987151 is about 2643.3219629852. The cubic root of 6987151 is about 191.1760025291.

The spelling of 6987151 in words is "six million, nine hundred eighty-seven thousand, one hundred fifty-one".