689696621023 has 2 divisors, whose sum is σ = 689696621024. Its totient is φ = 689696621022.

The previous prime is 689696620993. The next prime is 689696621111. The reversal of 689696621023 is 320126696986.

689696621023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689696621023 - 2²¹ = 689694523871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689696621323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344848310511 + 344848310512.

It is an arithmetic number, because the mean of its divisors is an integer number (344848310512).

Almost surely, 2^689696621023 is an apocalyptic number.

689696621023 is a deficient number, since it is larger than the sum of its proper divisors (1).

689696621023 is an equidigital number, since it uses as much as digits as its factorization.

689696621023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 689696621023 in words is "six hundred eighty-nine billion, six hundred ninety-six million, six hundred twenty-one thousand, twenty-three".