6987449 has 6 divisors (see below), whose sum is σ = 8128314. Its totient is φ = 5989200.

The previous prime is 6987433. The next prime is 6987451. The reversal of 6987449 is 9447896.

It can be written as a sum of positive squares in only one way, i.e., 6927424 + 60025 = 2632^2 + 245^2 .

It is not a de Polignac number, because 6987449 - 2⁴ = 6987433 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 9⁵ + 8⁷ + 7³ + 4⁴ + 4⁵ + 9⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6987419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71252 + ... + 71349.

It is an arithmetic number, because the mean of its divisors is an integer number (1354719).

Almost surely, 2^6987449 is an apocalyptic number.

It is an amenable number.

6987449 is a deficient number, since it is larger than the sum of its proper divisors (1140865).

6987449 is a wasteful number, since it uses less digits than its factorization.

6987449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142615 (or 142608 counting only the distinct ones).

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

The square root of 6987449 is about 2643.3783308486. The cubic root of 6987449 is about 191.1787203578.

The spelling of 6987449 in words is "six million, nine hundred eighty-seven thousand, four hundred forty-nine".