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690653329 = 2593266353
BaseRepresentation
bin101001001010101…
…000100010010001
31210010120211020221
4221022220202101
52403301401304
6152311033041
723054312362
oct5112504221
91703524227
10690653329
11324946083
1217336b781
13b0119012
1467a23b69
1540978054
hex292a8891

690653329 has 4 divisors (see below), whose sum is σ = 690922276. Its totient is φ = 690384384.

The previous prime is 690653317. The next prime is 690653333. The reversal of 690653329 is 923356096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336649104 + 354004225 = 18348^2 + 18815^2 .

It is a cyclic number.

It is not a de Polignac number, because 690653329 - 211 = 690651281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690653389) 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 in 3 ways as a sum of consecutive naturals, for example, 130584 + ... + 135769.

It is an arithmetic number, because the mean of its divisors is an integer number (172730569).

It is a 2568-hyperperfect number.

Almost surely, 2690653329 is an apocalyptic number.

It is an amenable number.

690653329 is a deficient number, since it is larger than the sum of its proper divisors (268947).

690653329 is a wasteful number, since it uses less digits than its factorization.

690653329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268946.

The product of its (nonzero) digits is 262440, while the sum is 43.

The square root of 690653329 is about 26280.2840357558. The cubic root of 690653329 is about 883.9344017613.

The spelling of 690653329 in words is "six hundred ninety million, six hundred fifty-three thousand, three hundred twenty-nine".

Divisors: 1 2593 266353 690653329