688055911 has 8 divisors (see below), whose sum is σ = 737935920. Its totient is φ = 639542592.

The previous prime is 688055887. The next prime is 688055941. The reversal of 688055911 is 119550886.

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 688055911 - 2²¹ = 685958759 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 (688055941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340630 + ... + 342643.

It is an arithmetic number, because the mean of its divisors is an integer number (92241990).

Almost surely, 2^688055911 is an apocalyptic number.

688055911 is a deficient number, since it is larger than the sum of its proper divisors (49880009).

688055911 is a wasteful number, since it uses less digits than its factorization.

688055911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683345.

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 688055911 is about 26230.8198690014. The cubic root of 688055911 is about 882.8249057391.

The spelling of 688055911 in words is "six hundred eighty-eight million, fifty-five thousand, nine hundred eleven".