6987149 has 8 divisors (see below), whose sum is σ = 7667352. Its totient is φ = 6327360.

The previous prime is 6987139. The next prime is 6987163. The reversal of 6987149 is 9417896.

It can be written as a sum of positive squares in 4 ways, for example, as 133225 + 6853924 = 365^2 + 2618^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6987149 - 2¹⁶ = 6921613 is a prime.

It is a super-2 number, since 2×6987149² = 97640502296402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4382 + ... + 5759.

It is an arithmetic number, because the mean of its divisors is an integer number (958419).

Almost surely, 2^6987149 is an apocalyptic number.

It is an amenable number.

6987149 is a deficient number, since it is larger than the sum of its proper divisors (680203).

6987149 is a wasteful number, since it uses less digits than its factorization.

6987149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10207.

The product of its digits is 108864, while the sum is 44.

The square root of 6987149 is about 2643.3215846733. The cubic root of 6987149 is about 191.1759842884.

The spelling of 6987149 in words is "six million, nine hundred eighty-seven thousand, one hundred forty-nine".