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99859979 is a prime number
BaseRepresentation
bin1011111001110…
…11111000001011
320221220102010202
411330323320023
5201031004404
613524202415
72321536652
oct574737013
9227812122
1099859979
115140630a
122953940b
13178c4b5b
14d396199
158b7821e
hex5f3be0b

99859979 has 2 divisors, whose sum is σ = 99859980. Its totient is φ = 99859978.

The previous prime is 99859961. The next prime is 99859999. The reversal of 99859979 is 97995899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99859979 - 212 = 99855883 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99859909) 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, 49929989 + 49929990.

It is an arithmetic number, because the mean of its divisors is an integer number (49929990).

Almost surely, 299859979 is an apocalyptic number.

99859979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859979 is an equidigital number, since it uses as much as digits as its factorization.

99859979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16533720, while the sum is 65.

The square root of 99859979 is about 9992.9964975477. The cubic root of 99859979 is about 463.9421421987.

The spelling of 99859979 in words is "ninety-nine million, eight hundred fifty-nine thousand, nine hundred seventy-nine".