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BaseRepresentation
bin1011111001111…
…11010101111001
320221221010121022
411330333111321
5201031433134
613524352225
72321626223
oct574772571
9227833538
1099874169
1151415a3a
1229545675
13178cb455
14d39b413
158b7c52e
hex5f3f579

99874169 has 2 divisors, whose sum is σ = 99874170. Its totient is φ = 99874168.

The previous prime is 99874139. The next prime is 99874189. The reversal of 99874169 is 96147899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 34668544 = 8075^2 + 5888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-99874169 is a prime.

It is a super-2 number, since 2×998741692 = 19949699266881122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99874169.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49937084 + 49937085.

It is an arithmetic number, because the mean of its divisors is an integer number (49937085).

Almost surely, 299874169 is an apocalyptic number.

It is an amenable number.

99874169 is a deficient number, since it is larger than the sum of its proper divisors (1).

99874169 is an equidigital number, since it uses as much as digits as its factorization.

99874169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 99874169 is about 9993.7064695737. The cubic root of 99874169 is about 463.9641163912.

The spelling of 99874169 in words is "ninety-nine million, eight hundred seventy-four thousand, one hundred sixty-nine".