689030101 has 2 divisors, whose sum is σ = 689030102. Its totient is φ = 689030100.

The previous prime is 689030081. The next prime is 689030119. The reversal of 689030101 is 101030986.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561927025 + 127103076 = 23705^2 + 11274^2 .

It is a cyclic number.

It is not a de Polignac number, because 689030101 - 2¹⁹ = 688505813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689030101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689030131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344515050 + 344515051.

It is an arithmetic number, because the mean of its divisors is an integer number (344515051).

Almost surely, 2^689030101 is an apocalyptic number.

It is an amenable number.

689030101 is a deficient number, since it is larger than the sum of its proper divisors (1).

689030101 is an equidigital number, since it uses as much as digits as its factorization.

689030101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 689030101 is about 26249.3828689362. The cubic root of 689030101 is about 883.2413610504.

The spelling of 689030101 in words is "six hundred eighty-nine million, thirty thousand, one hundred one".