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111689111 is a prime number
BaseRepresentation
bin1101010100000…
…11110110010111
321210011101122202
412222003312113
5212043022421
615025515115
72524225142
oct652036627
9253141582
10111689111
1158055756
12314a2a9b
131a1a7141
1410b95059
159c1310b
hex6a83d97

111689111 has 2 divisors, whose sum is σ = 111689112. Its totient is φ = 111689110.

The previous prime is 111689107. The next prime is 111689129. The reversal of 111689111 is 111986111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111689111 - 22 = 111689107 is a prime.

It is a Sophie Germain prime.

111689111 is a strobogrammatic number because it is the same when read upside-down.

It is equal to p6394250 and since 111689111 and 6394250 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111689101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55844555 + 55844556.

It is an arithmetic number, because the mean of its divisors is an integer number (55844556).

Almost surely, 2111689111 is an apocalyptic number.

111689111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111689111 is an equidigital number, since it uses as much as digits as its factorization.

111689111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 29.

The square root of 111689111 is about 10568.3069126516. The cubic root of 111689111 is about 481.5820355266.

The spelling of 111689111 in words is "one hundred eleven million, six hundred eighty-nine thousand, one hundred eleven".