688980545 has 8 divisors (see below), whose sum is σ = 901938240. Its totient is φ = 501076720.

The previous prime is 688980517. The next prime is 688980553. The reversal of 688980545 is 545089886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 688980545 - 2²⁰ = 687931969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6263405 + ... + 6263514.

It is an arithmetic number, because the mean of its divisors is an integer number (112742280).

Almost surely, 2^688980545 is an apocalyptic number.

It is an amenable number.

688980545 is a deficient number, since it is larger than the sum of its proper divisors (212957695).

688980545 is a wasteful number, since it uses less digits than its factorization.

688980545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12526935.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The square root of 688980545 is about 26248.4389059616. The cubic root of 688980545 is about 883.2201858950.

The spelling of 688980545 in words is "six hundred eighty-eight million, nine hundred eighty thousand, five hundred forty-five".