2685390317 has 4 divisors (see below), whose sum is σ = 2686124316. Its totient is φ = 2684656320.

The previous prime is 2685390299. The next prime is 2685390359. The reversal of 2685390317 is 7130935862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1388382121 + 1297008196 = 37261^2 + 36014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685390317 - 2¹⁶ = 2685324781 is a prime.

It is a super-2 number, since 2×2685390317² = 14422642309274720978, 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 (2685399317) 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, 361484 + ... + 368837.

It is an arithmetic number, because the mean of its divisors is an integer number (671531079).

Almost surely, 2^2685390317 is an apocalyptic number.

It is an amenable number.

2685390317 is a deficient number, since it is larger than the sum of its proper divisors (733999).

2685390317 is an equidigital number, since it uses as much as digits as its factorization.

2685390317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733998.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 2685390317 is about 51820.7517988691. The cubic root of 2685390317 is about 1389.9605456082.

The spelling of 2685390317 in words is "two billion, six hundred eighty-five million, three hundred ninety thousand, three hundred seventeen".