686462687 has 2 divisors, whose sum is σ = 686462688. Its totient is φ = 686462686.

The previous prime is 686462659. The next prime is 686462717. The reversal of 686462687 is 786264686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686462687 - 2¹⁰ = 686461663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686462617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343231343 + 343231344.

It is an arithmetic number, because the mean of its divisors is an integer number (343231344).

Almost surely, 2^686462687 is an apocalyptic number.

686462687 is a deficient number, since it is larger than the sum of its proper divisors (1).

686462687 is an equidigital number, since it uses as much as digits as its factorization.

686462687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 53.

The square root of 686462687 is about 26200.4329544380. The cubic root of 686462687 is about 882.1429723683.

The spelling of 686462687 in words is "six hundred eighty-six million, four hundred sixty-two thousand, six hundred eighty-seven".