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68652101 = 747712939
BaseRepresentation
bin1000001011110…
…00110001000101
311210011212222102
410011320301011
5120033331401
610451241445
71462350620
oct405706105
9153155872
1068652101
1135830381
121aba9285
13112b915b
149190db7
15606156b
hex4178c45

68652101 has 16 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 56762160.

The previous prime is 68652091. The next prime is 68652113. The reversal of 68652101 is 10125686.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2k-68652101 is a prime.

It is a super-2 number, since 2×686521012 = 9426221943428402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68652151) 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 15 ways as a sum of consecutive naturals, for example, 21890 + ... + 24828.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 268652101 is an apocalyptic number.

It is an amenable number.

68652101 is a deficient number, since it is larger than the sum of its proper divisors (12633019).

68652101 is a wasteful number, since it uses less digits than its factorization.

68652101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 68652101 is about 8285.6563409304. The cubic root of 68652101 is about 409.4660926671.

Adding to 68652101 its reverse (10125686), we get a palindrome (78777787).

The spelling of 68652101 in words is "sixty-eight million, six hundred fifty-two thousand, one hundred one".

Divisors: 1 7 47 71 329 497 2939 3337 20573 23359 138133 208669 966931 1460683 9807443 68652101