685961271 has 32 divisors (see below), whose sum is σ = 1086151680. Its totient is φ = 426354048.

The previous prime is 685961233. The next prime is 685961279. The reversal of 685961271 is 172169586.

685961271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685961271 - 2¹⁷ = 685830199 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685961279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42130 + ... + 56096.

It is an arithmetic number, because the mean of its divisors is an integer number (33942240).

Almost surely, 2^685961271 is an apocalyptic number.

685961271 is a deficient number, since it is larger than the sum of its proper divisors (400190409).

685961271 is a wasteful number, since it uses less digits than its factorization.

685961271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100 (or 14094 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 685961271 is about 26190.8623569366. The cubic root of 685961271 is about 881.9281375112.

The spelling of 685961271 in words is "six hundred eighty-five million, nine hundred sixty-one thousand, two hundred seventy-one".