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68780102 = 234390051
BaseRepresentation
bin1000001100110…
…00000001000110
311210102101120012
410012120001012
5120101430402
610454110222
71463423036
oct406300106
9153371505
1068780102
1135908566
121b04b372
13113324b1
1491c58c6
156089452
hex4198046

68780102 has 4 divisors (see below), whose sum is σ = 103170156. Its totient is φ = 34390050.

The previous prime is 68780093. The next prime is 68780111. The reversal of 68780102 is 20108786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20108786 = 210054393.

It is an interprime number because it is at equal distance from previous prime (68780093) and next prime (68780111).

It is a super-2 number, since 2×687801022 = 9461404862260808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17195024 + ... + 17195027.

It is an arithmetic number, because the mean of its divisors is an integer number (25792539).

Almost surely, 268780102 is an apocalyptic number.

68780102 is a deficient number, since it is larger than the sum of its proper divisors (34390054).

68780102 is a wasteful number, since it uses less digits than its factorization.

68780102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34390053.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 68780102 is about 8293.3769961337. The cubic root of 68780102 is about 409.7204161735.

Adding to 68780102 its reverse (20108786), we get a palindrome (88888888).

The spelling of 68780102 in words is "sixty-eight million, seven hundred eighty thousand, one hundred two".

Divisors: 1 2 34390051 68780102