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199001009 is a prime number
BaseRepresentation
bin10111101110010…
…00001110110001
3111212110022001202
423313020032301
5401421013014
631425140545
74634323604
oct1367101661
9455408052
10199001009
11a2370449
125678a755
13322c769c
141c60233b
151270d3de
hexbdc83b1

199001009 has 2 divisors, whose sum is σ = 199001010. Its totient is φ = 199001008.

The previous prime is 199000981. The next prime is 199001017. The reversal of 199001009 is 900100991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189667984 + 9333025 = 13772^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 199001009 - 224 = 182223793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199001039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99500504 + 99500505.

It is an arithmetic number, because the mean of its divisors is an integer number (99500505).

Almost surely, 2199001009 is an apocalyptic number.

It is an amenable number.

199001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

199001009 is an equidigital number, since it uses as much as digits as its factorization.

199001009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 199001009 is about 14106.7717426773. The cubic root of 199001009 is about 583.8282328162.

The spelling of 199001009 in words is "one hundred ninety-nine million, one thousand, nine".