686272471 has 2 divisors, whose sum is σ = 686272472. Its totient is φ = 686272470.

The previous prime is 686272423. The next prime is 686272493. The reversal of 686272471 is 174272686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686272471 - 2²⁷ = 552054743 is a prime.

It is a super-3 number, since 3×686272471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686272771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343136235 + 343136236.

It is an arithmetic number, because the mean of its divisors is an integer number (343136236).

Almost surely, 2^686272471 is an apocalyptic number.

686272471 is a deficient number, since it is larger than the sum of its proper divisors (1).

686272471 is an equidigital number, since it uses as much as digits as its factorization.

686272471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 686272471 is about 26196.8026865875. The cubic root of 686272471 is about 882.0614854393.

The spelling of 686272471 in words is "six hundred eighty-six million, two hundred seventy-two thousand, four hundred seventy-one".