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BaseRepresentation
bin10010101000000101…
…00101110101100001
3221210220120112221201
421110002211311201
5130434433300001
64332140321201
7502543514260
oct112402456541
927726515851
109999900001
114271756973
121b30b43201
13c34983ac0
146ac1385d7
153d7d8d501
hex2540a5d61

9999900001 has 32 divisors (see below), whose sum is σ = 12422955776. Its totient is φ = 7838208000.

The previous prime is 9999899993. The next prime is 9999900017. The reversal of 9999900001 is 1000099999.

It is not a de Polignac number, because 9999900001 - 23 = 9999899993 is a prime.

It is the 100000-th Hogben number.

It is a deceptive number, since it divides R9999900000.

It is not an unprimeable number, because it can be changed into a prime (9999900101) by changing a digit.

It is a nontrivial repunit in base 99999.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4626361 + ... + 4628521.

It is an arithmetic number, because the mean of its divisors is an integer number (388217368).

Almost surely, 29999900001 is an apocalyptic number.

9999900001 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9999900001 is a deficient number, since it is larger than the sum of its proper divisors (2423055775).

9999900001 is a wasteful number, since it uses less digits than its factorization.

9999900001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633.

The product of its (nonzero) digits is 59049, while the sum is 46.

The square root of 9999900001 is about 99999.5000037500. The cubic root of 9999900001 is about 2154.4275086308.

The spelling of 9999900001 in words is "nine billion, nine hundred ninety-nine million, nine hundred thousand, one".