688466249 has 8 divisors (see below), whose sum is σ = 707229600. Its totient is φ = 669828096.

The previous prime is 688466243. The next prime is 688466279. The reversal of 688466249 is 942664886.

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 688466249 - 2¹² = 688462153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688466249.

It is not an unprimeable number, because it can be changed into a prime (688466243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20099 + ... + 42200.

It is an arithmetic number, because the mean of its divisors is an integer number (88403700).

Almost surely, 2^688466249 is an apocalyptic number.

It is an amenable number.

688466249 is a deficient number, since it is larger than the sum of its proper divisors (18763351).

688466249 is a wasteful number, since it uses less digits than its factorization.

688466249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62599.

The product of its digits is 3981312, while the sum is 53.

The square root of 688466249 is about 26238.6403801721. The cubic root of 688466249 is about 883.0003685229. Note that the first 3 decimals are identical.

The spelling of 688466249 in words is "six hundred eighty-eight million, four hundred sixty-six thousand, two hundred forty-nine".