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99985579 is a prime number
BaseRepresentation
bin1011111010110…
…10100010101011
320222010210102121
411331122202223
5201044014304
613531012111
72322602101
oct575324253
9228123377
1099985579
1151491711
122959a037
131793a085
14d3c9c71
158ba0554
hex5f5a8ab

99985579 has 2 divisors, whose sum is σ = 99985580. Its totient is φ = 99985578.

The previous prime is 99985573. The next prime is 99985603. The reversal of 99985579 is 97558999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99985579 - 25 = 99985547 is a prime.

It is not a weakly prime, because it can be changed into another prime (99985573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992789 + 49992790.

It is an arithmetic number, because the mean of its divisors is an integer number (49992790).

Almost surely, 299985579 is an apocalyptic number.

99985579 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985579 is an equidigital number, since it uses as much as digits as its factorization.

99985579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 61.

The square root of 99985579 is about 9999.2789240025. The cubic root of 99985579 is about 464.1365701711.

The spelling of 99985579 in words is "ninety-nine million, nine hundred eighty-five thousand, five hundred seventy-nine".