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199056009 = 31725715187
BaseRepresentation
bin10111101110101…
…01101010001001
3111212120002111210
423313111222021
5401424243014
631430243333
74634643135
oct1367255211
9455502453
10199056009
11a23a87a9
12567b6549
1332316729
141c6183c5
151271e859
hexbdd5a89

199056009 has 16 divisors (see below), whose sum is σ = 282132288. Its totient is φ = 124403712.

The previous prime is 199055981. The next prime is 199056019. The reversal of 199056009 is 900650991.

It is not a de Polignac number, because 199056009 - 25 = 199055977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199056019) 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, 5514 + ... + 20700.

It is an arithmetic number, because the mean of its divisors is an integer number (17633268).

Almost surely, 2199056009 is an apocalyptic number.

It is an amenable number.

199056009 is a deficient number, since it is larger than the sum of its proper divisors (83076279).

199056009 is a wasteful number, since it uses less digits than its factorization.

199056009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15464.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 199056009 is about 14108.7210263723. The cubic root of 199056009 is about 583.8820141097.

The spelling of 199056009 in words is "one hundred ninety-nine million, fifty-six thousand, nine".

Divisors: 1 3 17 51 257 771 4369 13107 15187 45561 258179 774537 3903059 11709177 66352003 199056009