689631604993 has 8 divisors (see below), whose sum is σ = 699373722240. Its totient is φ = 679946626800.

The previous prime is 689631604969. The next prime is 689631605053. The reversal of 689631604993 is 399406136986.

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 689631604993 - 2²¹ = 689629507841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689631604903) 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, 14260455 + ... + 14308732.

It is an arithmetic number, because the mean of its divisors is an integer number (87421715280).

Almost surely, 2^689631604993 is an apocalyptic number.

It is an amenable number.

689631604993 is a deficient number, since it is larger than the sum of its proper divisors (9742117247).

689631604993 is a wasteful number, since it uses less digits than its factorization.

689631604993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28569527.

The product of its (nonzero) digits is 45349632, while the sum is 64.

The spelling of 689631604993 in words is "six hundred eighty-nine billion, six hundred thirty-one million, six hundred four thousand, nine hundred ninety-three".