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109888861 is a prime number
BaseRepresentation
bin1101000110011…
…00010101011101
321122202221011211
412203030111131
5211112420421
614523144421
72503016455
oct643142535
9248687154
10109888861
1157036145
1230975111
13199c68c4
1410846d65
1599a99e1
hex68cc55d

109888861 has 2 divisors, whose sum is σ = 109888862. Its totient is φ = 109888860.

The previous prime is 109888847. The next prime is 109888879. The reversal of 109888861 is 168888901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101002500 + 8886361 = 10050^2 + 2981^2 .

It is an emirp because it is prime and its reverse (168888901) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 198888601 and 106888891.

It is a cyclic number.

It is not a de Polignac number, because 109888861 - 25 = 109888829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109888661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54944430 + 54944431.

It is an arithmetic number, because the mean of its divisors is an integer number (54944431).

Almost surely, 2109888861 is an apocalyptic number.

It is an amenable number.

109888861 is a deficient number, since it is larger than the sum of its proper divisors (1).

109888861 is an equidigital number, since it uses as much as digits as its factorization.

109888861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 49.

The square root of 109888861 is about 10482.7887987882. The cubic root of 109888861 is about 478.9805635685.

The spelling of 109888861 in words is "one hundred nine million, eight hundred eighty-eight thousand, eight hundred sixty-one".