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99921919 is a prime number
BaseRepresentation
bin1011111010010…
…10111111111111
320222000120002211
411331022333333
5201040000134
613525401251
72322215356
oct575127777
9228016084
1099921919
11514488a9
1229569227
13179170c6
14d3b099d
158b8b764
hex5f4afff

99921919 has 2 divisors, whose sum is σ = 99921920. Its totient is φ = 99921918.

The previous prime is 99921911. The next prime is 99921929. The reversal of 99921919 is 91912999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99921919 - 23 = 99921911 is a prime.

It is a super-2 number, since 2×999219192 = 19968779793285122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99921911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49960959 + 49960960.

It is an arithmetic number, because the mean of its divisors is an integer number (49960960).

Almost surely, 299921919 is an apocalyptic number.

99921919 is a deficient number, since it is larger than the sum of its proper divisors (1).

99921919 is an equidigital number, since it uses as much as digits as its factorization.

99921919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 49.

The square root of 99921919 is about 9996.0951876220. The cubic root of 99921919 is about 464.0380452727.

It can be divided in two parts, 9992 and 1919, that added together give a palindrome (11911).

The spelling of 99921919 in words is "ninety-nine million, nine hundred twenty-one thousand, nine hundred nineteen".