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68874831 = 3221136269
BaseRepresentation
bin1000001101011…
…11001001001111
311210121012111200
410012233021033
5120112443311
610500120543
71464266154
oct406571117
9153535450
1068874831
1135972753
121b096153
131136664c
14920c22b
1560a7556
hex41af24f

68874831 has 12 divisors (see below), whose sum is σ = 99960120. Its totient is φ = 45697680.

The previous prime is 68874821. The next prime is 68874833. The reversal of 68874831 is 13847886.

It is not a de Polignac number, because 68874831 - 29 = 68874319 is a prime.

It is a super-2 number, since 2×688748312 = 9487484690557122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68874833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16236 + ... + 20033.

It is an arithmetic number, because the mean of its divisors is an integer number (8330010).

Almost surely, 268874831 is an apocalyptic number.

68874831 is a deficient number, since it is larger than the sum of its proper divisors (31085289).

68874831 is a wasteful number, since it uses less digits than its factorization.

68874831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36486 (or 36483 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 68874831 is about 8299.0861545112. The cubic root of 68874831 is about 409.9084288854.

The spelling of 68874831 in words is "sixty-eight million, eight hundred seventy-four thousand, eight hundred thirty-one".

Divisors: 1 3 9 211 633 1899 36269 108807 326421 7652759 22958277 68874831