689572229 has 2 divisors, whose sum is σ = 689572230. Its totient is φ = 689572228.

The previous prime is 689572211. The next prime is 689572249. The reversal of 689572229 is 922275986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669412129 + 20160100 = 25873^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 689572229 - 2¹² = 689568133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689572249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344786114 + 344786115.

It is an arithmetic number, because the mean of its divisors is an integer number (344786115).

Almost surely, 2^689572229 is an apocalyptic number.

It is an amenable number.

689572229 is a deficient number, since it is larger than the sum of its proper divisors (1).

689572229 is an equidigital number, since it uses as much as digits as its factorization.

689572229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 689572229 is about 26259.7073289098. The cubic root of 689572229 is about 883.4729447145.

The spelling of 689572229 in words is "six hundred eighty-nine million, five hundred seventy-two thousand, two hundred twenty-nine".