686737325 has 6 divisors (see below), whose sum is σ = 851554314. Its totient is φ = 549389840.

The previous prime is 686737319. The next prime is 686737333. The reversal of 686737325 is 523737686.

It can be written as a sum of positive squares in 3 ways, for example, as 81036004 + 605701321 = 9002^2 + 24611^2 .

It is not a de Polignac number, because 686737325 - 2⁴ = 686737309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686737325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13734722 + ... + 13734771.

It is an arithmetic number, because the mean of its divisors is an integer number (141925719).

Almost surely, 2^686737325 is an apocalyptic number.

It is an amenable number.

686737325 is a deficient number, since it is larger than the sum of its proper divisors (164816989).

686737325 is a wasteful number, since it uses less digits than its factorization.

686737325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27469503 (or 27469498 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 686737325 is about 26205.6735269292. The cubic root of 686737325 is about 882.2605984168.

The spelling of 686737325 in words is "six hundred eighty-six million, seven hundred thirty-seven thousand, three hundred twenty-five".