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111201993 = 32710317137
BaseRepresentation
bin1101010000011…
…00111011001001
321202020122110100
412220030323021
5211431430433
615011240013
72520126030
oct650147311
9252218410
10111201993
1157852781
12312a9009
131a0664c6
1410aa9717
159b68b13
hex6a0cec9

111201993 has 24 divisors (see below), whose sum is σ = 185364608. Its totient is φ = 62923392.

The previous prime is 111201971. The next prime is 111202019. The reversal of 111201993 is 399102111.

It is not a de Polignac number, because 111201993 - 218 = 110939849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111201943) 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 23 ways as a sum of consecutive naturals, for example, 2080 + ... + 15057.

Almost surely, 2111201993 is an apocalyptic number.

It is an amenable number.

111201993 is a deficient number, since it is larger than the sum of its proper divisors (74162615).

111201993 is a wasteful number, since it uses less digits than its factorization.

111201993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17253 (or 17250 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 111201993 is about 10545.2355592466. The cubic root of 111201993 is about 480.8808954137.

The spelling of 111201993 in words is "one hundred eleven million, two hundred one thousand, nine hundred ninety-three".

Divisors: 1 3 7 9 21 63 103 309 721 927 2163 6489 17137 51411 119959 154233 359877 1079631 1765111 5295333 12355777 15885999 37067331 111201993