1686887353 has 2 divisors, whose sum is σ = 1686887354. Its totient is φ = 1686887352.

The previous prime is 1686887347. The next prime is 1686887429. The reversal of 1686887353 is 3537886861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1424836009 + 262051344 = 37747^2 + 16188^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686887353 - 2⁹ = 1686886841 is a prime.

It is a super-2 number, since 2×1686887353² = 5691177883422693218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1686887294 and 1686887303.

It is not a weakly prime, because it can be changed into another prime (1686887303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843443676 + 843443677.

It is an arithmetic number, because the mean of its divisors is an integer number (843443677).

Almost surely, 2^1686887353 is an apocalyptic number.

It is an amenable number.

1686887353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686887353 is an equidigital number, since it uses as much as digits as its factorization.

1686887353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The square root of 1686887353 is about 41071.7342341421. The cubic root of 1686887353 is about 1190.4066950196.

The spelling of 1686887353 in words is "one billion, six hundred eighty-six million, eight hundred eighty-seven thousand, three hundred fifty-three".