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99874189 is a prime number
BaseRepresentation
bin1011111001111…
…11010110001101
320221221010122001
411330333112031
5201031433224
613524352301
72321626252
oct574772615
9227833561
1099874189
1151415a58
1229545691
13178cb46c
14d39b429
158b7c544
hex5f3f58d

99874189 has 2 divisors, whose sum is σ = 99874190. Its totient is φ = 99874188.

The previous prime is 99874169. The next prime is 99874199. The reversal of 99874189 is 98147899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66292164 + 33582025 = 8142^2 + 5795^2 .

It is an emirp because it is prime and its reverse (98147899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99874189 - 217 = 99743117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99874129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49937094 + 49937095.

It is an arithmetic number, because the mean of its divisors is an integer number (49937095).

Almost surely, 299874189 is an apocalyptic number.

It is an amenable number.

99874189 is a deficient number, since it is larger than the sum of its proper divisors (1).

99874189 is an equidigital number, since it uses as much as digits as its factorization.

99874189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 55.

The square root of 99874189 is about 9993.7074702034. The cubic root of 99874189 is about 463.9641473611.

The spelling of 99874189 in words is "ninety-nine million, eight hundred seventy-four thousand, one hundred eighty-nine".