686843147 has 2 divisors, whose sum is σ = 686843148. Its totient is φ = 686843146.

The previous prime is 686843119. The next prime is 686843153. The reversal of 686843147 is 741348686.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686843147 - 2¹² = 686839051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (686843447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343421573 + 343421574.

It is an arithmetic number, because the mean of its divisors is an integer number (343421574).

Almost surely, 2^686843147 is an apocalyptic number.

686843147 is a deficient number, since it is larger than the sum of its proper divisors (1).

686843147 is an equidigital number, since it uses as much as digits as its factorization.

686843147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 47.

The square root of 686843147 is about 26207.6925157481. The cubic root of 686843147 is about 882.3059130675.

The spelling of 686843147 in words is "six hundred eighty-six million, eight hundred forty-three thousand, one hundred forty-seven".