687087445 has 8 divisors (see below), whose sum is σ = 899460000. Its totient is φ = 499699920.

The previous prime is 687087439. The next prime is 687087449. The reversal of 687087445 is 544780786.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-687087445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687087449) 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, 6246195 + ... + 6246304.

It is an arithmetic number, because the mean of its divisors is an integer number (112432500).

Almost surely, 2^687087445 is an apocalyptic number.

It is an amenable number.

687087445 is a deficient number, since it is larger than the sum of its proper divisors (212372555).

687087445 is a wasteful number, since it uses less digits than its factorization.

687087445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492515.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The square root of 687087445 is about 26212.3529085048. The cubic root of 687087445 is about 882.4105075544.

The spelling of 687087445 in words is "six hundred eighty-seven million, eighty-seven thousand, four hundred forty-five".