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68904941 = 7231393079
BaseRepresentation
bin1000001101101…
…10011111101101
311210122201210212
410012312133231
5120114424231
610500512205
71464453020
oct406663755
9153581725
1068904941
1135993336
121b0ab665
1311377271
1492191b7
1560b142b
hex41b67ed

68904941 has 16 divisors (see below), whose sum is σ = 82790400. Its totient is φ = 56068848.

The previous prime is 68904931. The next prime is 68904943. The reversal of 68904941 is 14940986.

It is not a de Polignac number, because 68904941 - 214 = 68888557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68904943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20840 + ... + 23918.

It is an arithmetic number, because the mean of its divisors is an integer number (5174400).

Almost surely, 268904941 is an apocalyptic number.

It is an amenable number.

68904941 is a deficient number, since it is larger than the sum of its proper divisors (13885459).

68904941 is a wasteful number, since it uses less digits than its factorization.

68904941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68904941 is about 8300.9000114445. The cubic root of 68904941 is about 409.9681533860.

The spelling of 68904941 in words is "sixty-eight million, nine hundred four thousand, nine hundred forty-one".

Divisors: 1 7 23 139 161 973 3079 3197 21553 22379 70817 427981 495719 2995867 9843563 68904941