6989281 has 4 divisors (see below), whose sum is σ = 7526932. Its totient is φ = 6451632.

The previous prime is 6989273. The next prime is 6989287. The reversal of 6989281 is 1829896.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 819025 + 6170256 = 905^2 + 2484^2 .

It is a cyclic number.

It is not a de Polignac number, because 6989281 - 2³ = 6989273 is a prime.

It is a super-2 number, since 2×6989281² = 97700097793922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989287) 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, 268806 + ... + 268831.

It is an arithmetic number, because the mean of its divisors is an integer number (1881733).

Almost surely, 2^6989281 is an apocalyptic number.

It is an amenable number.

6989281 is a deficient number, since it is larger than the sum of its proper divisors (537651).

6989281 is a wasteful number, since it uses less digits than its factorization.

6989281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537650.

The product of its digits is 62208, while the sum is 43.

The square root of 6989281 is about 2643.7248343956. The cubic root of 6989281 is about 191.1954269227.

The spelling of 6989281 in words is "six million, nine hundred eighty-nine thousand, two hundred eighty-one".