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68100071 = 132537603
BaseRepresentation
bin1000000111100…
…01111111100111
311202010211201212
410003301333213
5114413200241
610431342035
71454561324
oct403617747
9152124655
1068100071
1135493656
121a98191b
1311154b00
149089b4b
155ea2beb
hex40f1fe7

68100071 has 12 divisors (see below), whose sum is σ = 75142728. Its totient is φ = 61667424.

The previous prime is 68100061. The next prime is 68100077. The reversal of 68100071 is 17000186.

It is not a de Polignac number, because 68100071 - 26 = 68100007 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 (68100077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5156 + ... + 12758.

It is an arithmetic number, because the mean of its divisors is an integer number (6261894).

Almost surely, 268100071 is an apocalyptic number.

68100071 is a deficient number, since it is larger than the sum of its proper divisors (7042657).

68100071 is a wasteful number, since it uses less digits than its factorization.

68100071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682 (or 7669 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 68100071 is about 8252.2767161554. The cubic root of 68100071 is about 408.3656352437.

The spelling of 68100071 in words is "sixty-eight million, one hundred thousand, seventy-one".

Divisors: 1 13 53 169 689 7603 8957 98839 402959 1284907 5238467 68100071