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989905111 = 131929138197
BaseRepresentation
bin111011000000001…
…100000011010111
32112222200101112021
4323000030003113
54011403430421
6242121034011
733350024506
oct7300140327
92488611467
10989905111
114688593a8
12237625907
1312a114390
149568083d
155bd8a341
hex3b00c0d7

989905111 has 16 divisors (see below), whose sum is σ = 1160863200. Its totient is φ = 835809408.

The previous prime is 989905099. The next prime is 989905139. The reversal of 989905111 is 111509989.

It is a cyclic number.

It is not a de Polignac number, because 989905111 - 27 = 989904983 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 (989905171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61936 + ... + 76261.

It is an arithmetic number, because the mean of its divisors is an integer number (72553950).

Almost surely, 2989905111 is an apocalyptic number.

989905111 is a deficient number, since it is larger than the sum of its proper divisors (170958089).

989905111 is a wasteful number, since it uses less digits than its factorization.

989905111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138258.

The product of its (nonzero) digits is 29160, while the sum is 43.

The square root of 989905111 is about 31462.7575237772. The cubic root of 989905111 is about 996.6236500911.

The spelling of 989905111 in words is "nine hundred eighty-nine million, nine hundred five thousand, one hundred eleven".

Divisors: 1 13 19 29 247 377 551 7163 138197 1796561 2625743 4007713 34134659 52100269 76146547 989905111