686450447 has 2 divisors, whose sum is σ = 686450448. Its totient is φ = 686450446.

The previous prime is 686450441. The next prime is 686450459. The reversal of 686450447 is 744054686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686450447 - 2⁴ = 686450431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686450398 and 686450407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686450441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343225223 + 343225224.

It is an arithmetic number, because the mean of its divisors is an integer number (343225224).

Almost surely, 2^686450447 is an apocalyptic number.

686450447 is a deficient number, since it is larger than the sum of its proper divisors (1).

686450447 is an equidigital number, since it uses as much as digits as its factorization.

686450447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 686450447 is about 26200.1993694705. The cubic root of 686450447 is about 882.1377293088.

The spelling of 686450447 in words is "six hundred eighty-six million, four hundred fifty thousand, four hundred forty-seven".