686370271 has 2 divisors, whose sum is σ = 686370272. Its totient is φ = 686370270.

The previous prime is 686370263. The next prime is 686370323. The reversal of 686370271 is 172073686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686370271 - 2³ = 686370263 is a prime.

It is a super-2 number, since 2×686370271² = 942208297825226882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686370211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343185135 + 343185136.

It is an arithmetic number, because the mean of its divisors is an integer number (343185136).

Almost surely, 2^686370271 is an apocalyptic number.

686370271 is a deficient number, since it is larger than the sum of its proper divisors (1).

686370271 is an equidigital number, since it uses as much as digits as its factorization.

686370271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 686370271 is about 26198.6692600979. The cubic root of 686370271 is about 882.1033840143.

The spelling of 686370271 in words is "six hundred eighty-six million, three hundred seventy thousand, two hundred seventy-one".