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68201069 = 292351761
BaseRepresentation
bin1000001000010…
…10101001101101
311202022222021112
410010022221231
5114424413234
610433441405
71455461636
oct404125155
9152288245
1068201069
1135552522
121aa10265
131118ba81
1490b488d
155ec2ace
hex410aa6d

68201069 has 4 divisors (see below), whose sum is σ = 70552860. Its totient is φ = 65849280.

The previous prime is 68201057. The next prime is 68201087. The reversal of 68201069 is 96010286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47087044 + 21114025 = 6862^2 + 4595^2 .

It is a cyclic number.

It is not a de Polignac number, because 68201069 - 216 = 68135533 is a prime.

It is a super-2 number, since 2×682010692 = 9302771625485522, 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 (68201039) 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 3 ways as a sum of consecutive naturals, for example, 1175852 + ... + 1175909.

It is an arithmetic number, because the mean of its divisors is an integer number (17638215).

Almost surely, 268201069 is an apocalyptic number.

It is an amenable number.

68201069 is a deficient number, since it is larger than the sum of its proper divisors (2351791).

68201069 is a wasteful number, since it uses less digits than its factorization.

68201069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351790.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 68201069 is about 8258.3938511069. The cubic root of 68201069 is about 408.5674154530.

The spelling of 68201069 in words is "sixty-eight million, two hundred one thousand, sixty-nine".

Divisors: 1 29 2351761 68201069