686273923 has 2 divisors, whose sum is σ = 686273924. Its totient is φ = 686273922.

The previous prime is 686273897. The next prime is 686273941. The reversal of 686273923 is 329372686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686273923 is a prime.

It is a super-3 number, since 3×686273923³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (686273723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343136961 + 343136962.

It is an arithmetic number, because the mean of its divisors is an integer number (343136962).

Almost surely, 2^686273923 is an apocalyptic number.

686273923 is a deficient number, since it is larger than the sum of its proper divisors (1).

686273923 is an equidigital number, since it uses as much as digits as its factorization.

686273923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 686273923 is about 26196.8303998785. The cubic root of 686273923 is about 882.0621075209.

The spelling of 686273923 in words is "six hundred eighty-six million, two hundred seventy-three thousand, nine hundred twenty-three".