687648233 has 8 divisors (see below), whose sum is σ = 694709568. Its totient is φ = 680598864.

The previous prime is 687648223. The next prime is 687648257. The reversal of 687648233 is 332846786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687648233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687648223) 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, 153260 + ... + 157682.

It is an arithmetic number, because the mean of its divisors is an integer number (86838696).

Almost surely, 2^687648233 is an apocalyptic number.

It is an amenable number.

687648233 is a deficient number, since it is larger than the sum of its proper divisors (7061335).

687648233 is a wasteful number, since it uses less digits than its factorization.

687648233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983.

The product of its digits is 1161216, while the sum is 47.

The square root of 687648233 is about 26223.0477443031. The cubic root of 687648233 is about 882.6505112883.

The spelling of 687648233 in words is "six hundred eighty-seven million, six hundred forty-eight thousand, two hundred thirty-three".