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199829909 is a prime number
BaseRepresentation
bin10111110100100…
…10100110010101
3111221000102002202
423322102212111
5402124024114
631455014245
74644345326
oct1372224625
9457012082
10199829909
11a2887194
1256b0a385
1332527a66
141c77a44d
1512823cde
hexbe92995

199829909 has 2 divisors, whose sum is σ = 199829910. Its totient is φ = 199829908.

The previous prime is 199829893. The next prime is 199829921. The reversal of 199829909 is 909928991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199798225 + 31684 = 14135^2 + 178^2 .

It is an emirp because it is prime and its reverse (909928991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199829909 - 24 = 199829893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199829939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99914954 + 99914955.

It is an arithmetic number, because the mean of its divisors is an integer number (99914955).

Almost surely, 2199829909 is an apocalyptic number.

It is an amenable number.

199829909 is a deficient number, since it is larger than the sum of its proper divisors (1).

199829909 is an equidigital number, since it uses as much as digits as its factorization.

199829909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 56.

The square root of 199829909 is about 14136.1207196317. The cubic root of 199829909 is about 584.6377175896.

The spelling of 199829909 in words is "one hundred ninety-nine million, eight hundred twenty-nine thousand, nine hundred nine".