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68001181 = 675771759
BaseRepresentation
bin1000000110110…
…01110110011101
311201221211002021
410003121312131
5114402014211
610425300141
71454000113
oct403316635
9151854067
1068001181
1135426326
121a934651
131111bab1
149061ab3
155e83771
hex40d9d9d

68001181 has 8 divisors (see below), whose sum is σ = 69175040. Its totient is φ = 66832128.

The previous prime is 68001169. The next prime is 68001203. The reversal of 68001181 is 18110086.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68001181 - 25 = 68001149 is a prime.

It is a super-2 number, since 2×680011812 = 9248321234789522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37780 + ... + 39538.

It is an arithmetic number, because the mean of its divisors is an integer number (8646880).

Almost surely, 268001181 is an apocalyptic number.

It is an amenable number.

68001181 is a deficient number, since it is larger than the sum of its proper divisors (1173859).

68001181 is a wasteful number, since it uses less digits than its factorization.

68001181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 68001181 is about 8246.2828595677. The cubic root of 68001181 is about 408.1678731362.

The spelling of 68001181 in words is "sixty-eight million, one thousand, one hundred eighty-one".

Divisors: 1 67 577 1759 38659 117853 1014943 68001181