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99987211 is a prime number
BaseRepresentation
bin1011111010110…
…10111100001011
320222010212200001
411331122330023
5201044042321
613531023431
72322606622
oct575327413
9228125601
1099987211
1151492965
122959ab77
131793aa3c
14d3ca6b9
158ba0c91
hex5f5af0b

99987211 has 2 divisors, whose sum is σ = 99987212. Its totient is φ = 99987210.

The previous prime is 99987197. The next prime is 99987221. The reversal of 99987211 is 11278999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99987211 - 29 = 99986699 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99987221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993605 + 49993606.

It is an arithmetic number, because the mean of its divisors is an integer number (49993606).

Almost surely, 299987211 is an apocalyptic number.

99987211 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987211 is an equidigital number, since it uses as much as digits as its factorization.

99987211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 46.

The square root of 99987211 is about 9999.3605295539. The cubic root of 99987211 is about 464.1390954245.

The spelling of 99987211 in words is "ninety-nine million, nine hundred eighty-seven thousand, two hundred eleven".