689452426769 has 8 divisors (see below), whose sum is σ = 696576710760. Its totient is φ = 682328480256.

The previous prime is 689452426763. The next prime is 689452426799. The reversal of 689452426769 is 967624254986.

It can be written as a sum of positive squares in 4 ways, for example, as 20295706369 + 669156720400 = 142463^2 + 818020^2 .

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 689452426769 - 2²⁸ = 689183991313 is a prime.

It is a super-2 number, since 2×689452426769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689452426699 and 689452426708.

It is not an unprimeable number, because it can be changed into a prime (689452426763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7989947 + ... + 8075775.

It is an arithmetic number, because the mean of its divisors is an integer number (87072088845).

Almost surely, 2^689452426769 is an apocalyptic number.

It is an amenable number.

689452426769 is a deficient number, since it is larger than the sum of its proper divisors (7124283991).

689452426769 is an equidigital number, since it uses as much as digits as its factorization.

689452426769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168739.

The product of its digits is 313528320, while the sum is 68.

The spelling of 689452426769 in words is "six hundred eighty-nine billion, four hundred fifty-two million, four hundred twenty-six thousand, seven hundred sixty-nine".