6891023 has 4 divisors (see below), whose sum is σ = 7007880. Its totient is φ = 6774168.

The previous prime is 6891019. The next prime is 6891029. The reversal of 6891023 is 3201986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201986 = 2 ⋅1600993.

It is a cyclic number.

It is not a de Polignac number, because 6891023 - 2² = 6891019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58340 + ... + 58457.

It is an arithmetic number, because the mean of its divisors is an integer number (1751970).

Almost surely, 2^6891023 is an apocalyptic number.

6891023 is a deficient number, since it is larger than the sum of its proper divisors (116857).

6891023 is a wasteful number, since it uses less digits than its factorization.

6891023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116856.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 6891023 is about 2625.0758084292. The cubic root of 6891023 is about 190.2952289289.

The spelling of 6891023 in words is "six million, eight hundred ninety-one thousand, twenty-three".