686425061 has 4 divisors (see below), whose sum is σ = 784485792. Its totient is φ = 588364332.

The previous prime is 686425043. The next prime is 686425067. The reversal of 686425061 is 160524686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686425061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686425067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49030355 + ... + 49030368.

It is an arithmetic number, because the mean of its divisors is an integer number (196121448).

Almost surely, 2^686425061 is an apocalyptic number.

It is an amenable number.

686425061 is a deficient number, since it is larger than the sum of its proper divisors (98060731).

686425061 is an equidigital number, since it uses as much as digits as its factorization.

686425061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98060730.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 686425061 is about 26199.7149030290. The cubic root of 686425061 is about 882.1268549019.

The spelling of 686425061 in words is "six hundred eighty-six million, four hundred twenty-five thousand, sixty-one".