686573023 has 4 divisors (see below), whose sum is σ = 716424048. Its totient is φ = 656722000.

The previous prime is 686573009. The next prime is 686573051. The reversal of 686573023 is 320375686.

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

It is a cyclic number.

It is not a de Polignac number, because 686573023 - 2²¹ = 684475871 is a prime.

It is a super-2 number, since 2×686573023² = 942765031822717058, 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 (686573623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14925478 + ... + 14925523.

It is an arithmetic number, because the mean of its divisors is an integer number (179106012).

Almost surely, 2^686573023 is an apocalyptic number.

686573023 is a deficient number, since it is larger than the sum of its proper divisors (29851025).

686573023 is a wasteful number, since it uses less digits than its factorization.

686573023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29851024.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 686573023 is about 26202.5384838950. The cubic root of 686573023 is about 882.1902324814.

The spelling of 686573023 in words is "six hundred eighty-six million, five hundred seventy-three thousand, twenty-three".