687282082639 has 4 divisors (see below), whose sum is σ = 687285334960. Its totient is φ = 687278830320.

The previous prime is 687282082633. The next prime is 687282082661. The reversal of 687282082639 is 936280282786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 687282082639 - 2¹¹ = 687282080591 is a prime.

It is a super-2 number, since 2×687282082639² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687282082633) 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, 1285374 + ... + 1739755.

It is an arithmetic number, because the mean of its divisors is an integer number (171821333740).

Almost surely, 2^687282082639 is an apocalyptic number.

687282082639 is a deficient number, since it is larger than the sum of its proper divisors (3252321).

687282082639 is a wasteful number, since it uses less digits than its factorization.

687282082639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252320.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 687282082639 in words is "six hundred eighty-seven billion, two hundred eighty-two million, eighty-two thousand, six hundred thirty-nine".