688521201 has 8 divisors (see below), whose sum is σ = 918259104. Its totient is φ = 458898720.

The previous prime is 688521187. The next prime is 688521263. The reversal of 688521201 is 102125886.

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

It is not a de Polignac number, because 688521201 - 2¹⁰ = 688520177 is a prime.

It is a super-2 number, since 2×688521201² = 948122888452964802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (688521901) 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, 13815 + ... + 39596.

It is an arithmetic number, because the mean of its divisors is an integer number (114782388).

Almost surely, 2^688521201 is an apocalyptic number.

It is an amenable number.

688521201 is a deficient number, since it is larger than the sum of its proper divisors (229737903).

688521201 is a wasteful number, since it uses less digits than its factorization.

688521201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57711.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 688521201 is about 26239.6875171943. The cubic root of 688521201 is about 883.0238610060.

The spelling of 688521201 in words is "six hundred eighty-eight million, five hundred twenty-one thousand, two hundred one".