685277873 has 4 divisors (see below), whose sum is σ = 783174720. Its totient is φ = 587381028.

The previous prime is 685277867. The next prime is 685277911. The reversal of 685277873 is 378772586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685277873 - 2¹⁰ = 685276849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685277833) 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, 48948413 + ... + 48948426.

It is an arithmetic number, because the mean of its divisors is an integer number (195793680).

Almost surely, 2^685277873 is an apocalyptic number.

It is an amenable number.

685277873 is a deficient number, since it is larger than the sum of its proper divisors (97896847).

685277873 is an equidigital number, since it uses as much as digits as its factorization.

685277873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97896846.

The product of its digits is 3951360, while the sum is 53.

The square root of 685277873 is about 26177.8126091543. The cubic root of 685277873 is about 881.6351626677.

The spelling of 685277873 in words is "six hundred eighty-five million, two hundred seventy-seven thousand, eight hundred seventy-three".