689696621039 has 4 divisors (see below), whose sum is σ = 690398246256. Its totient is φ = 688994995824.

The previous prime is 689696621023. The next prime is 689696621111. The reversal of 689696621039 is 930126696986.

689696621039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 689696621039 - 2⁴ = 689696621023 is a prime.

It is a super-2 number, since 2×689696621039² (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 (689696621639) 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, 350811134 + ... + 350813099.

It is an arithmetic number, because the mean of its divisors is an integer number (172599561564).

Almost surely, 2^689696621039 is an apocalyptic number.

689696621039 is a deficient number, since it is larger than the sum of its proper divisors (701625217).

689696621039 is an equidigital number, since it uses as much as digits as its factorization.

689696621039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701625216.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 689696621039 in words is "six hundred eighty-nine billion, six hundred ninety-six million, six hundred twenty-one thousand, thirty-nine".