689106401 has 2 divisors, whose sum is σ = 689106402. Its totient is φ = 689106400.

The previous prime is 689106367. The next prime is 689106403. The reversal of 689106401 is 104601986.

689106401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484044001 + 205062400 = 22001^2 + 14320^2 .

It is a cyclic number.

It is not a de Polignac number, because 689106401 - 2⁶ = 689106337 is a prime.

Together with 689106403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (689106403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344553200 + 344553201.

It is an arithmetic number, because the mean of its divisors is an integer number (344553201).

Almost surely, 2^689106401 is an apocalyptic number.

It is an amenable number.

689106401 is a deficient number, since it is larger than the sum of its proper divisors (1).

689106401 is an equidigital number, since it uses as much as digits as its factorization.

689106401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 689106401 is about 26250.8361962053. The cubic root of 689106401 is about 883.2739618653.

The spelling of 689106401 in words is "six hundred eighty-nine million, one hundred six thousand, four hundred one".