689935039901 has 2 divisors, whose sum is σ = 689935039902. Its totient is φ = 689935039900.

The previous prime is 689935039897. The next prime is 689935039909. The reversal of 689935039901 is 109930539986.

689935039901 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 can be written as a sum of positive squares in only one way, i.e., 635964780676 + 53970259225 = 797474^2 + 232315^2 .

It is a cyclic number.

It is not a de Polignac number, because 689935039901 - 2² = 689935039897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689935039909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344967519950 + 344967519951.

It is an arithmetic number, because the mean of its divisors is an integer number (344967519951).

Almost surely, 2^689935039901 is an apocalyptic number.

It is an amenable number.

689935039901 is a deficient number, since it is larger than the sum of its proper divisors (1).

689935039901 is an equidigital number, since it uses as much as digits as its factorization.

689935039901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14171760, while the sum is 62.

The spelling of 689935039901 in words is "six hundred eighty-nine billion, nine hundred thirty-five million, thirty-nine thousand, nine hundred one".