687741085 has 4 divisors (see below), whose sum is σ = 825289308. Its totient is φ = 550192864.

The previous prime is 687741073. The next prime is 687741139. The reversal of 687741085 is 580147786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 167262489 + 520478596 = 12933^2 + 22814^2 .

It is a cyclic number.

It is not a de Polignac number, because 687741085 - 2⁵ = 687741053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68774104 + ... + 68774113.

It is an arithmetic number, because the mean of its divisors is an integer number (206322327).

Almost surely, 2^687741085 is an apocalyptic number.

It is an amenable number.

687741085 is a deficient number, since it is larger than the sum of its proper divisors (137548223).

687741085 is a wasteful number, since it uses less digits than its factorization.

687741085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137548222.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 687741085 is about 26224.8181118573. The cubic root of 687741085 is about 882.6902371117.

The spelling of 687741085 in words is "six hundred eighty-seven million, seven hundred forty-one thousand, eighty-five".