686620343 has 2 divisors, whose sum is σ = 686620344. Its totient is φ = 686620342.

The previous prime is 686620307. The next prime is 686620349. The reversal of 686620343 is 343026686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686620343 - 2¹⁰ = 686619319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686620297 and 686620306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686620349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343310171 + 343310172.

It is an arithmetic number, because the mean of its divisors is an integer number (343310172).

Almost surely, 2^686620343 is an apocalyptic number.

686620343 is a deficient number, since it is larger than the sum of its proper divisors (1).

686620343 is an equidigital number, since it uses as much as digits as its factorization.

686620343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 686620343 is about 26203.4414342849. The cubic root of 686620343 is about 882.2104994603.

The spelling of 686620343 in words is "six hundred eighty-six million, six hundred twenty thousand, three hundred forty-three".