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199958917 is a prime number
BaseRepresentation
bin10111110101100…
…10000110000101
3111221020222001211
423322302012011
5402142141132
631501451421
74645423414
oct1372620605
9457228054
10199958917
11a2965104
1256b70b71
13325716b2
141c7b147b
151284c147
hexbeb2185

199958917 has 2 divisors, whose sum is σ = 199958918. Its totient is φ = 199958916.

The previous prime is 199958839. The next prime is 199958921. The reversal of 199958917 is 719859991.

It is a happy number.

199958917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140991876 + 58967041 = 11874^2 + 7679^2 .

It is an emirp because it is prime and its reverse (719859991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199958917 - 227 = 65741189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199958977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99979458 + 99979459.

It is an arithmetic number, because the mean of its divisors is an integer number (99979459).

Almost surely, 2199958917 is an apocalyptic number.

It is an amenable number.

199958917 is a deficient number, since it is larger than the sum of its proper divisors (1).

199958917 is an equidigital number, since it uses as much as digits as its factorization.

199958917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 58.

The square root of 199958917 is about 14140.6830457372. The cubic root of 199958917 is about 584.7635024269.

The spelling of 199958917 in words is "one hundred ninety-nine million, nine hundred fifty-eight thousand, nine hundred seventeen".