688878553 has 4 divisors (see below), whose sum is σ = 751503888. Its totient is φ = 626253220.

The previous prime is 688878529. The next prime is 688878571. The reversal of 688878553 is 355878886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 688878553 - 2¹³ = 688870361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688872553) 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 3 ways as a sum of consecutive naturals, for example, 31312651 + ... + 31312672.

It is an arithmetic number, because the mean of its divisors is an integer number (187875972).

Almost surely, 2^688878553 is an apocalyptic number.

It is an amenable number.

688878553 is a deficient number, since it is larger than the sum of its proper divisors (62625335).

688878553 is a wasteful number, since it uses less digits than its factorization.

688878553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62625334.

The product of its digits is 12902400, while the sum is 58.

The square root of 688878553 is about 26246.4960137539. The cubic root of 688878553 is about 883.1766017720.

The spelling of 688878553 in words is "six hundred eighty-eight million, eight hundred seventy-eight thousand, five hundred fifty-three".