686056141 has 2 divisors, whose sum is σ = 686056142. Its totient is φ = 686056140.

The previous prime is 686056093. The next prime is 686056153. The reversal of 686056141 is 141650686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674181225 + 11874916 = 25965^2 + 3446^2 .

It is a cyclic number.

It is not a de Polignac number, because 686056141 - 2¹¹ = 686054093 is a prime.

It is equal to p_35567722 and since 686056141 and 35567722 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686056141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686056181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343028070 + 343028071.

It is an arithmetic number, because the mean of its divisors is an integer number (343028071).

Almost surely, 2^686056141 is an apocalyptic number.

It is an amenable number.

686056141 is a deficient number, since it is larger than the sum of its proper divisors (1).

686056141 is an equidigital number, since it uses as much as digits as its factorization.

686056141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 686056141 is about 26192.6734221614. The cubic root of 686056141 is about 881.9687931911.

It can be divided in two parts, 6860 and 56141, that added together give a square (63001 = 251²).

The spelling of 686056141 in words is "six hundred eighty-six million, fifty-six thousand, one hundred forty-one".