686601125 has 16 divisors (see below), whose sum is σ = 979290624. Its totient is φ = 470811600.

The previous prime is 686601121. The next prime is 686601127. The reversal of 686601125 is 521106686.

It is a happy number.

It is not a de Polignac number, because 686601125 - 2² = 686601121 is a prime.

It is a super-2 number, since 2×686601125² = 942842209702531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686601121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391469 + ... + 393218.

It is an arithmetic number, because the mean of its divisors is an integer number (61205664).

Almost surely, 2^686601125 is an apocalyptic number.

It is an amenable number.

686601125 is a deficient number, since it is larger than the sum of its proper divisors (292689499).

686601125 is an equidigital number, since it uses as much as digits as its factorization.

686601125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784709 (or 784699 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 686601125 is about 26203.0747241617. The cubic root of 686601125 is about 882.2022685751.

The spelling of 686601125 in words is "six hundred eighty-six million, six hundred one thousand, one hundred twenty-five".