687143613 has 32 divisors (see below), whose sum is σ = 1046090752. Its totient is φ = 398131200.

The previous prime is 687143599. The next prime is 687143623. The reversal of 687143613 is 316341786.

It is not a de Polignac number, because 687143613 - 2¹² = 687139517 is a prime.

It is a super-3 number, since 3×687143613³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 (687143623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37053 + ... + 52413.

It is an arithmetic number, because the mean of its divisors is an integer number (32690336).

Almost surely, 2^687143613 is an apocalyptic number.

It is an amenable number.

687143613 is a deficient number, since it is larger than the sum of its proper divisors (358947139).

687143613 is a wasteful number, since it uses less digits than its factorization.

687143613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15445.

The product of its digits is 72576, while the sum is 39.

The square root of 687143613 is about 26213.4242898558. The cubic root of 687143613 is about 882.4345519868.

It can be divided in two parts, 68714 and 3613, that added together give a palindrome (72327).

The spelling of 687143613 in words is "six hundred eighty-seven million, one hundred forty-three thousand, six hundred thirteen".