689019101 has 2 divisors, whose sum is σ = 689019102. Its totient is φ = 689019100.

The previous prime is 689019083. The next prime is 689019109. The reversal of 689019101 is 101910986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583464025 + 105555076 = 24155^2 + 10274^2 .

It is a cyclic number.

It is not a de Polignac number, because 689019101 - 2²² = 684824797 is a prime.

It is a Chen prime.

It is equal to p_35713466 and since 689019101 and 35713466 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689019109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344509550 + 344509551.

It is an arithmetic number, because the mean of its divisors is an integer number (344509551).

Almost surely, 2^689019101 is an apocalyptic number.

It is an amenable number.

689019101 is a deficient number, since it is larger than the sum of its proper divisors (1).

689019101 is an equidigital number, since it uses as much as digits as its factorization.

689019101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 689019101 is about 26249.1733393644. The cubic root of 689019101 is about 883.2366608655.

The spelling of 689019101 in words is "six hundred eighty-nine million, nineteen thousand, one hundred one".