688788873 has 16 divisors (see below), whose sum is σ = 1022070400. Its totient is φ = 458453520.

The previous prime is 688788869. The next prime is 688788911. The reversal of 688788873 is 378887886.

It is not a de Polignac number, because 688788873 - 2² = 688788869 is a prime.

It is a super-2 number, since 2×688788873² = 948860223137220258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688788873.

It is not an unprimeable number, because it can be changed into a prime (688788973) 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, 3178 + ... + 37251.

It is an arithmetic number, because the mean of its divisors is an integer number (63879400).

Almost surely, 2^688788873 is an apocalyptic number.

It is an amenable number.

688788873 is a deficient number, since it is larger than the sum of its proper divisors (333281527).

688788873 is a wasteful number, since it uses less digits than its factorization.

688788873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41069 (or 41063 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 63.

The square root of 688788873 is about 26244.7875396239. The cubic root of 688788873 is about 883.1382753672.

The spelling of 688788873 in words is "six hundred eighty-eight million, seven hundred eighty-eight thousand, eight hundred seventy-three".