686630050969 has 2 divisors, whose sum is σ = 686630050970. Its totient is φ = 686630050968.

The previous prime is 686630050867. The next prime is 686630051021. The reversal of 686630050969 is 969050036686.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500679362569 + 185950688400 = 707587^2 + 431220^2 .

It is a cyclic number.

It is not a de Polignac number, because 686630050969 - 2¹⁵ = 686630018201 is a prime.

It is a super-2 number, since 2×686630050969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (686630030969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343315025484 + 343315025485.

It is an arithmetic number, because the mean of its divisors is an integer number (343315025485).

Almost surely, 2^686630050969 is an apocalyptic number.

It is an amenable number.

686630050969 is a deficient number, since it is larger than the sum of its proper divisors (1).

686630050969 is an equidigital number, since it uses as much as digits as its factorization.

686630050969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 58.

The spelling of 686630050969 in words is "six hundred eighty-six billion, six hundred thirty million, fifty thousand, nine hundred sixty-nine".