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68054831 = 135234987
BaseRepresentation
bin1000000111001…
…10111100101111
311202001112200022
410003212330233
5114410223311
610430352355
71454312405
oct403467457
9152045608
1068054831
1135462669
121a95b6bb
131113a340
149077475
155e945db
hex40e6f2f

68054831 has 4 divisors (see below), whose sum is σ = 73289832. Its totient is φ = 62819832.

The previous prime is 68054821. The next prime is 68054837. The reversal of 68054831 is 13845086.

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

It is a cyclic number.

It is not a de Polignac number, because 68054831 - 218 = 67792687 is a prime.

It is a super-2 number, since 2×680548312 = 9262920044877122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68054791 and 68054800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68054837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2617481 + ... + 2617506.

It is an arithmetic number, because the mean of its divisors is an integer number (18322458).

Almost surely, 268054831 is an apocalyptic number.

68054831 is a deficient number, since it is larger than the sum of its proper divisors (5235001).

68054831 is a wasteful number, since it uses less digits than its factorization.

68054831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5235000.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 68054831 is about 8249.5351990279. The cubic root of 68054831 is about 408.2751872038.

The spelling of 68054831 in words is "sixty-eight million, fifty-four thousand, eight hundred thirty-one".

Divisors: 1 13 5234987 68054831