6858623 has 4 divisors (see below), whose sum is σ = 7156848. Its totient is φ = 6560400.

The previous prime is 6858617. The next prime is 6858637. The reversal of 6858623 is 3268586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3268586 = 2 ⋅1634293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6858623 is a prime.

It is a super-2 number, since 2×6858623² = 94081418912258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6858613) 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, 149078 + ... + 149123.

It is an arithmetic number, because the mean of its divisors is an integer number (1789212).

Almost surely, 2^6858623 is an apocalyptic number.

6858623 is a deficient number, since it is larger than the sum of its proper divisors (298225).

6858623 is a wasteful number, since it uses less digits than its factorization.

6858623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298224.

The product of its digits is 69120, while the sum is 38.

The square root of 6858623 is about 2618.8972870275. The cubic root of 6858623 is about 189.9965188651.

The spelling of 6858623 in words is "six million, eight hundred fifty-eight thousand, six hundred twenty-three".