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68254081 = 729336227
BaseRepresentation
bin1000001000101…
…11100110000001
311202102122222221
410010113212001
5114433112311
610434531041
71456102330
oct404274601
9152378887
1068254081
1135589335
121aa36a81
13111a9c3c
1490c9d17
155ed3671
hex4117981

68254081 has 8 divisors (see below), whose sum is σ = 80694720. Its totient is φ = 56485968.

The previous prime is 68254079. The next prime is 68254093. The reversal of 68254081 is 18045286.

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

It is not a de Polignac number, because 68254081 - 21 = 68254079 is a prime.

It is a super-2 number, since 2×682540812 = 9317239146309122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68254981) 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, 167911 + ... + 168316.

It is an arithmetic number, because the mean of its divisors is an integer number (10086840).

Almost surely, 268254081 is an apocalyptic number.

It is an amenable number.

68254081 is a deficient number, since it is larger than the sum of its proper divisors (12440639).

68254081 is a wasteful number, since it uses less digits than its factorization.

68254081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336263.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 68254081 is about 8261.6028105931. The cubic root of 68254081 is about 408.6732464749.

The spelling of 68254081 in words is "sixty-eight million, two hundred fifty-four thousand, eighty-one".

Divisors: 1 7 29 203 336227 2353589 9750583 68254081