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69286061 = 1326919813
BaseRepresentation
bin1000010000100…
…11100010101101
311211101002121102
410020103202231
5120214123221
610513012445
71500631115
oct410234255
9154332542
1069286061
1136123709
121b254125
131147b890
1492b8045
15613930b
hex42138ad

69286061 has 8 divisors (see below), whose sum is σ = 74896920. Its totient is φ = 63715392.

The previous prime is 69286013. The next prime is 69286069. The reversal of 69286061 is 16068296.

It can be written as a sum of positive squares in 4 ways, for example, as 12208036 + 57078025 = 3494^2 + 7555^2 .

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

It is a de Polignac number, because none of the positive numbers 2k-69286061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69286069) 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 7 ways as a sum of consecutive naturals, for example, 6410 + ... + 13403.

It is an arithmetic number, because the mean of its divisors is an integer number (9362115).

Almost surely, 269286061 is an apocalyptic number.

It is an amenable number.

69286061 is a deficient number, since it is larger than the sum of its proper divisors (5610859).

69286061 is a wasteful number, since it uses less digits than its factorization.

69286061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20095.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 69286061 is about 8323.8249020507. The cubic root of 69286061 is about 410.7226221255.

The spelling of 69286061 in words is "sixty-nine million, two hundred eighty-six thousand, sixty-one".

Divisors: 1 13 269 3497 19813 257569 5329697 69286061