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68744951 = 1110216121
BaseRepresentation
bin1000001100011…
…11011011110111
311210100121100022
410012033123313
5120044314301
610453235355
71463215412
oct406173367
9153317308
1068744951
1135894110
121b032b5b
131131c4b2
1491b6b79
15607dd1b
hex418f6f7

68744951 has 8 divisors (see below), whose sum is σ = 75080208. Its totient is φ = 62424000.

The previous prime is 68744909. The next prime is 68744959. The reversal of 68744951 is 15944786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68744951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68744959) 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, 8171 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (9385026).

Almost surely, 268744951 is an apocalyptic number.

68744951 is a deficient number, since it is larger than the sum of its proper divisors (6335257).

68744951 is a wasteful number, since it uses less digits than its factorization.

68744951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153.

The product of its digits is 241920, while the sum is 44.

The square root of 68744951 is about 8291.2575041425. The cubic root of 68744951 is about 409.6506065625.

The spelling of 68744951 in words is "sixty-eight million, seven hundred forty-four thousand, nine hundred fifty-one".

Divisors: 1 11 1021 6121 11231 67331 6249541 68744951