6840523 has 4 divisors (see below), whose sum is σ = 7025440. Its totient is φ = 6655608.

The previous prime is 6840497. The next prime is 6840527. The reversal of 6840523 is 3250486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6840491 and 6840500.

It is not an unprimeable number, because it can be changed into a prime (6840527) 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, 92403 + ... + 92476.

It is an arithmetic number, because the mean of its divisors is an integer number (1756360).

Almost surely, 2^6840523 is an apocalyptic number.

6840523 is a deficient number, since it is larger than the sum of its proper divisors (184917).

6840523 is a wasteful number, since it uses less digits than its factorization.

6840523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184916.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6840523 is about 2615.4393512372. The cubic root of 6840523 is about 189.8292371543.

The spelling of 6840523 in words is "six million, eight hundred forty thousand, five hundred twenty-three".