685130537 has 8 divisors (see below), whose sum is σ = 843237696. Its totient is φ = 542081232.

The previous prime is 685130531. The next prime is 685130599. The reversal of 685130537 is 735031586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685130537 - 2¹⁰ = 685129513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685130537.

It is not an unprimeable number, because it can be changed into a prime (685130531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3764363 + ... + 3764544.

It is an arithmetic number, because the mean of its divisors is an integer number (105404712).

Almost surely, 2^685130537 is an apocalyptic number.

It is an amenable number.

685130537 is a deficient number, since it is larger than the sum of its proper divisors (158107159).

685130537 is a wasteful number, since it uses less digits than its factorization.

685130537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528927.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 685130537 is about 26174.9983190066. The cubic root of 685130537 is about 881.5719737464.

The spelling of 685130537 in words is "six hundred eighty-five million, one hundred thirty thousand, five hundred thirty-seven".