687570001 has 8 divisors (see below), whose sum is σ = 707221800. Its totient is φ = 667974528.

The previous prime is 687569963. The next prime is 687570017. The reversal of 687570001 is 100075786.

It can be written as a sum of positive squares in 4 ways, for example, as 548683776 + 138886225 = 23424^2 + 11785^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 687570001 - 2²⁷ = 553352273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687570701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11325 + ... + 38773.

It is an arithmetic number, because the mean of its divisors is an integer number (88402725).

Almost surely, 2^687570001 is an apocalyptic number.

It is an amenable number.

687570001 is a deficient number, since it is larger than the sum of its proper divisors (19651799).

687570001 is a wasteful number, since it uses less digits than its factorization.

687570001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28163.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 687570001 is about 26221.5560369708. The cubic root of 687570001 is about 882.6170377136.

The spelling of 687570001 in words is "six hundred eighty-seven million, five hundred seventy thousand, one".