687964089 has 8 divisors (see below), whose sum is σ = 926191552. Its totient is φ = 454189680.

The previous prime is 687964049. The next prime is 687964091. The reversal of 687964089 is 980469786.

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

It is not a de Polignac number, because 687964089 - 2¹⁷ = 687833017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687964019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112902 + ... + 1113519.

It is an arithmetic number, because the mean of its divisors is an integer number (115773944).

Almost surely, 2^687964089 is an apocalyptic number.

It is an amenable number.

687964089 is a deficient number, since it is larger than the sum of its proper divisors (238227463).

687964089 is a wasteful number, since it uses less digits than its factorization.

687964089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226527.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The square root of 687964089 is about 26229.0695412552. The cubic root of 687964089 is about 882.7856325960.

The spelling of 687964089 in words is "six hundred eighty-seven million, nine hundred sixty-four thousand, eighty-nine".