686828119 has 2 divisors, whose sum is σ = 686828120. Its totient is φ = 686828118.

The previous prime is 686828063. The next prime is 686828123. The reversal of 686828119 is 911828686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686828119 - 2¹¹ = 686826071 is a prime.

It is a super-2 number, since 2×686828119² = 943465730098156322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686828159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343414059 + 343414060.

It is an arithmetic number, because the mean of its divisors is an integer number (343414060).

Almost surely, 2^686828119 is an apocalyptic number.

686828119 is a deficient number, since it is larger than the sum of its proper divisors (1).

686828119 is an equidigital number, since it uses as much as digits as its factorization.

686828119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 49.

The square root of 686828119 is about 26207.4058044668. The cubic root of 686828119 is about 882.2994781242.

The spelling of 686828119 in words is "six hundred eighty-six million, eight hundred twenty-eight thousand, one hundred nineteen".