6858961 has 4 divisors (see below), whose sum is σ = 6879652. Its totient is φ = 6838272.

The previous prime is 6858953. The next prime is 6858979. The reversal of 6858961 is 1698586.

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 2193361 + 4665600 = 1481^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858961 - 2³ = 6858953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6858661) 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, 9840 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (1719913).

Almost surely, 2^6858961 is an apocalyptic number.

It is an amenable number.

6858961 is a deficient number, since it is larger than the sum of its proper divisors (20691).

6858961 is a wasteful number, since it uses less digits than its factorization.

6858961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20690.

The product of its digits is 103680, while the sum is 43.

The square root of 6858961 is about 2618.9618172093. The cubic root of 6858961 is about 189.9996398885. Note that the first 3 decimals are identical.

The spelling of 6858961 in words is "six million, eight hundred fifty-eight thousand, nine hundred sixty-one".