686550143 has 2 divisors, whose sum is σ = 686550144. Its totient is φ = 686550142.

The previous prime is 686550121. The next prime is 686550173. The reversal of 686550143 is 341055686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686550143 - 2⁸ = 686549887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686550097 and 686550106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686550173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343275071 + 343275072.

It is an arithmetic number, because the mean of its divisors is an integer number (343275072).

Almost surely, 2^686550143 is an apocalyptic number.

686550143 is a deficient number, since it is larger than the sum of its proper divisors (1).

686550143 is an equidigital number, since it uses as much as digits as its factorization.

686550143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 686550143 is about 26202.1018813377. The cubic root of 686550143 is about 882.1804327291.

The spelling of 686550143 in words is "six hundred eighty-six million, five hundred fifty thousand, one hundred forty-three".