689397086869 has 4 divisors (see below), whose sum is σ = 690147247840. Its totient is φ = 688646925900.

The previous prime is 689397086867. The next prime is 689397086887. The reversal of 689397086869 is 968680793986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689397086869 - 2¹ = 689397086867 is a prime.

It is a super-2 number, since 2×689397086869² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689397086867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375079107 + ... + 375080944.

It is an arithmetic number, because the mean of its divisors is an integer number (172536811960).

Almost surely, 2^689397086869 is an apocalyptic number.

It is an amenable number.

689397086869 is a deficient number, since it is larger than the sum of its proper divisors (750160971).

689397086869 is an equidigital number, since it uses as much as digits as its factorization.

689397086869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750160970.

The product of its (nonzero) digits is 1693052928, while the sum is 79.

The spelling of 689397086869 in words is "six hundred eighty-nine billion, three hundred ninety-seven million, eighty-six thousand, eight hundred sixty-nine".