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99000221 is a prime number
BaseRepresentation
bin1011110011010…
…01111110011101
320220021201202212
411321221332131
5200321001341
613453530205
72311326245
oct571517635
9226251685
1099000221
1150979371
12291a3965
1317683718
14d210b25
158a585eb
hex5e69f9d

99000221 has 2 divisors, whose sum is σ = 99000222. Its totient is φ = 99000220.

The previous prime is 99000217. The next prime is 99000259. The reversal of 99000221 is 12200099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 26988025 = 8486^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 99000221 - 22 = 99000217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99090221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49500110 + 49500111.

It is an arithmetic number, because the mean of its divisors is an integer number (49500111).

Almost surely, 299000221 is an apocalyptic number.

It is an amenable number.

99000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99000221 is an equidigital number, since it uses as much as digits as its factorization.

99000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 99000221 is about 9949.8854767279. The cubic root of 99000221 is about 462.6068451471.

The spelling of 99000221 in words is "ninety-nine million, two hundred twenty-one", and thus it is an aban number.