687090069 has 24 divisors (see below), whose sum is σ = 1027952640. Its totient is φ = 441719712.

The previous prime is 687090067. The next prime is 687090073. The reversal of 687090069 is 960090786.

It is not a de Polignac number, because 687090069 - 2¹ = 687090067 is a prime.

It is a super-3 number, since 3×687090069³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687090067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412332 + ... + 413994.

It is an arithmetic number, because the mean of its divisors is an integer number (42831360).

Almost surely, 2^687090069 is an apocalyptic number.

It is an amenable number.

687090069 is a deficient number, since it is larger than the sum of its proper divisors (340862571).

687090069 is a wasteful number, since it uses less digits than its factorization.

687090069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3278 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 687090069 is about 26212.4029611938. The cubic root of 687090069 is about 882.4116308672.

The spelling of 687090069 in words is "six hundred eighty-seven million, ninety thousand, sixty-nine".