685977351 has 8 divisors (see below), whose sum is σ = 919924080. Its totient is φ = 454674432.

The previous prime is 685977343. The next prime is 685977389. The reversal of 685977351 is 153779586.

685977351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685977351 - 2³ = 685977343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685977294 and 685977303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685975351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660346 + ... + 661383.

It is an arithmetic number, because the mean of its divisors is an integer number (114990510).

Almost surely, 2^685977351 is an apocalyptic number.

685977351 is a deficient number, since it is larger than the sum of its proper divisors (233946729).

685977351 is a wasteful number, since it uses less digits than its factorization.

685977351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321905.

The product of its digits is 1587600, while the sum is 51.

The square root of 685977351 is about 26191.1693324296. The cubic root of 685977351 is about 881.9350287135.

The spelling of 685977351 in words is "six hundred eighty-five million, nine hundred seventy-seven thousand, three hundred fifty-one".