687887893 has 16 divisors (see below), whose sum is σ = 858201984. Its totient is φ = 535656960.

The previous prime is 687887867. The next prime is 687887927. The reversal of 687887893 is 398788786.

It is a cyclic number.

It is not a de Polignac number, because 687887893 - 2²¹ = 685790741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687887293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212221 + ... + 215437.

It is an arithmetic number, because the mean of its divisors is an integer number (53637624).

Almost surely, 2^687887893 is an apocalyptic number.

It is an amenable number.

687887893 is a deficient number, since it is larger than the sum of its proper divisors (170314091).

687887893 is a wasteful number, since it uses less digits than its factorization.

687887893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6012.

The product of its digits is 32514048, while the sum is 64.

The square root of 687887893 is about 26227.6169904931. The cubic root of 687887893 is about 882.7530401886.

The spelling of 687887893 in words is "six hundred eighty-seven million, eight hundred eighty-seven thousand, eight hundred ninety-three".