686004469 has 2 divisors, whose sum is σ = 686004470. Its totient is φ = 686004468.

The previous prime is 686004427. The next prime is 686004523. The reversal of 686004469 is 964400686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641608900 + 44395569 = 25330^2 + 6663^2 .

It is a cyclic number.

It is not a de Polignac number, because 686004469 - 2²¹ = 683907317 is a prime.

It is a super-2 number, since 2×686004469² = 941204262975943922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686004409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343002234 + 343002235.

It is an arithmetic number, because the mean of its divisors is an integer number (343002235).

Almost surely, 2^686004469 is an apocalyptic number.

It is an amenable number.

686004469 is a deficient number, since it is larger than the sum of its proper divisors (1).

686004469 is an equidigital number, since it uses as much as digits as its factorization.

686004469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 686004469 is about 26191.6870208851. The cubic root of 686004469 is about 881.9466500880.

The spelling of 686004469 in words is "six hundred eighty-six million, four thousand, four hundred sixty-nine".