688981373 has 16 divisors (see below), whose sum is σ = 712204416. Its totient is φ = 666247680.

The previous prime is 688981309. The next prime is 688981411. The reversal of 688981373 is 373189886.

It is a cyclic number.

It is not a de Polignac number, because 688981373 - 2⁶ = 688981309 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 (688981873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1590965 + ... + 1591397.

It is an arithmetic number, because the mean of its divisors is an integer number (44512776).

Almost surely, 2^688981373 is an apocalyptic number.

It is an amenable number.

688981373 is a deficient number, since it is larger than the sum of its proper divisors (23223043).

688981373 is a wasteful number, since it uses less digits than its factorization.

688981373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its digits is 1741824, while the sum is 53.

The square root of 688981373 is about 26248.4546783234. The cubic root of 688981373 is about 883.2205397057.

It can be divided in two parts, 6889813 and 73, that added together give a palindrome (6889886).

The spelling of 688981373 in words is "six hundred eighty-eight million, nine hundred eighty-one thousand, three hundred seventy-three".