686110553 has 2 divisors, whose sum is σ = 686110554. Its totient is φ = 686110552.

The previous prime is 686110549. The next prime is 686110589. The reversal of 686110553 is 355011686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685811344 + 299209 = 26188^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 686110553 - 2² = 686110549 is a prime.

It is not a weakly prime, because it can be changed into another prime (686116553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343055276 + 343055277.

It is an arithmetic number, because the mean of its divisors is an integer number (343055277).

Almost surely, 2^686110553 is an apocalyptic number.

It is an amenable number.

686110553 is a deficient number, since it is larger than the sum of its proper divisors (1).

686110553 is an equidigital number, since it uses as much as digits as its factorization.

686110553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 686110553 is about 26193.7120889728. The cubic root of 686110553 is about 881.9921092700.

The spelling of 686110553 in words is "six hundred eighty-six million, one hundred ten thousand, five hundred fifty-three".