688669330469 has 8 divisors (see below), whose sum is σ = 725327472960. Its totient is φ = 652570854496.

The previous prime is 688669330399. The next prime is 688669330471. The reversal of 688669330469 is 964033966886.

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-688669330469 is a prime.

It is a super-2 number, since 2×688669330469² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 688669330399 and 688669330408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688669330169) 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, 139914104 + ... + 139919025.

It is an arithmetic number, because the mean of its divisors is an integer number (90665934120).

Almost surely, 2^688669330469 is an apocalyptic number.

It is an amenable number.

688669330469 is a deficient number, since it is larger than the sum of its proper divisors (36658142491).

688669330469 is a wasteful number, since it uses less digits than its factorization.

688669330469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279833259.

The product of its (nonzero) digits is 241864704, while the sum is 68.

The spelling of 688669330469 in words is "six hundred eighty-eight billion, six hundred sixty-nine million, three hundred thirty thousand, four hundred sixty-nine".