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68812037 = 718154311
BaseRepresentation
bin1000001100111…
…11110100000101
311210111000100222
410012133310011
5120103441122
610454514125
71463615120
oct406376405
9153430328
1068812037
113592a558
121b065945
1311343ba8
1491d33b7
156093b42
hex419fd05

68812037 has 8 divisors (see below), whose sum is σ = 79078272. Its totient is φ = 58654800.

The previous prime is 68812013. The next prime is 68812061. The reversal of 68812037 is 73021886.

It is an interprime number because it is at equal distance from previous prime (68812013) and next prime (68812061).

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 68812037 - 26 = 68811973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68811988 and 68812006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68812097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25889 + ... + 28422.

It is an arithmetic number, because the mean of its divisors is an integer number (9884784).

Almost surely, 268812037 is an apocalyptic number.

It is an amenable number.

68812037 is a deficient number, since it is larger than the sum of its proper divisors (10266235).

68812037 is a wasteful number, since it uses less digits than its factorization.

68812037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54499.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 68812037 is about 8295.3021042033. The cubic root of 68812037 is about 409.7838182165.

The spelling of 68812037 in words is "sixty-eight million, eight hundred twelve thousand, thirty-seven".

Divisors: 1 7 181 1267 54311 380177 9830291 68812037