686686453 has 2 divisors, whose sum is σ = 686686454. Its totient is φ = 686686452.

The previous prime is 686686397. The next prime is 686686463. The reversal of 686686453 is 354686686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585543204 + 101143249 = 24198^2 + 10057^2 .

It is a cyclic number.

It is not a de Polignac number, because 686686453 - 2¹⁷ = 686555381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686686453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686686463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343343226 + 343343227.

It is an arithmetic number, because the mean of its divisors is an integer number (343343227).

Almost surely, 2^686686453 is an apocalyptic number.

It is an amenable number.

686686453 is a deficient number, since it is larger than the sum of its proper divisors (1).

686686453 is an equidigital number, since it uses as much as digits as its factorization.

686686453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 52.

The square root of 686686453 is about 26204.7028794451. The cubic root of 686686453 is about 882.2388125666.

The spelling of 686686453 in words is "six hundred eighty-six million, six hundred eighty-six thousand, four hundred fifty-three".