686370067 has 2 divisors, whose sum is σ = 686370068. Its totient is φ = 686370066.

The previous prime is 686370059. The next prime is 686370073. The reversal of 686370067 is 760073686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686370067 - 2³ = 686370059 is a prime.

It is a super-2 number, since 2×686370067² = 942207737747168978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (686370007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343185033 + 343185034.

It is an arithmetic number, because the mean of its divisors is an integer number (343185034).

Almost surely, 2^686370067 is an apocalyptic number.

686370067 is a deficient number, since it is larger than the sum of its proper divisors (1).

686370067 is an equidigital number, since it uses as much as digits as its factorization.

686370067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 686370067 is about 26198.6653667701. The cubic root of 686370067 is about 882.1032966226.

The spelling of 686370067 in words is "six hundred eighty-six million, three hundred seventy thousand, sixty-seven".