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68203349 = 232965363
BaseRepresentation
bin1000001000010…
…11001101010101
311202100002101222
410010023031111
5114430001344
610433500125
71455501404
oct404131525
9152302358
1068203349
1135554205
121aa11645
131118cb16
1490b563b
155ec35ee
hex410b355

68203349 has 4 divisors (see below), whose sum is σ = 71168736. Its totient is φ = 65237964.

The previous prime is 68203339. The next prime is 68203357. The reversal of 68203349 is 94330286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94330286 = 247165143.

It is a cyclic number.

It is not a de Polignac number, because 68203349 - 216 = 68137813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68203309) 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, 1482659 + ... + 1482704.

It is an arithmetic number, because the mean of its divisors is an integer number (17792184).

Almost surely, 268203349 is an apocalyptic number.

It is an amenable number.

68203349 is a deficient number, since it is larger than the sum of its proper divisors (2965387).

68203349 is a wasteful number, since it uses less digits than its factorization.

68203349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965386.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 68203349 is about 8258.5318913231. The cubic root of 68203349 is about 408.5719682816.

The spelling of 68203349 in words is "sixty-eight million, two hundred three thousand, three hundred forty-nine".

Divisors: 1 23 2965363 68203349