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BaseRepresentation
bin111011100001111…
…001000011011101
32120121022020222101
4323201321003131
54021134141224
6243034245101
733515102656
oct7341710335
92517266871
10998740189
11472843317
1223a586791
1312bbb8935
149690052d
155ca33044
hex3b8790dd

998740189 has 2 divisors, whose sum is σ = 998740190. Its totient is φ = 998740188.

The previous prime is 998740181. The next prime is 998740213. The reversal of 998740189 is 981047899.

It can be divided in two parts, 9987 and 40189, that added together give a square (50176 = 2242).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502208100 + 496532089 = 22410^2 + 22283^2 .

It is a cyclic number.

It is not a de Polignac number, because 998740189 - 23 = 998740181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998740181) 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, 499370094 + 499370095.

It is an arithmetic number, because the mean of its divisors is an integer number (499370095).

Almost surely, 2998740189 is an apocalyptic number.

It is an amenable number.

998740189 is a deficient number, since it is larger than the sum of its proper divisors (1).

998740189 is an equidigital number, since it uses as much as digits as its factorization.

998740189 is an odious number, because the sum of its binary digits is odd.

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

The square root of 998740189 is about 31602.8509631647. The cubic root of 998740189 is about 999.5798865294.

The spelling of 998740189 in words is "nine hundred ninety-eight million, seven hundred forty thousand, one hundred eighty-nine".