Base | Representation |
---|---|
bin | 111011100100110… |
… | …1101011001000001 |
3 | 12011022112110000101 |
4 | 1313021231121001 |
5 | 13043223041141 |
6 | 530210122401 |
7 | 100352336143 |
oct | 16711553101 |
9 | 5138473011 |
10 | 1999033921 |
11 | 936447855 |
12 | 479580401 |
13 | 25b1c9711 |
14 | 14d6c6c93 |
15 | ba771531 |
hex | 7726d641 |
1999033921 has 8 divisors (see below), whose sum is σ = 2025495360. Its totient is φ = 1972745328.
The previous prime is 1999033903. The next prime is 1999033951. The reversal of 1999033921 is 1293309991.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1999033921 - 25 = 1999033889 is a prime.
It is a super-2 number, since 2×19990339212 = 7992273234617268482, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1999033951) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19846 + ... + 66271.
It is an arithmetic number, because the mean of its divisors is an integer number (253186920).
Almost surely, 21999033921 is an apocalyptic number.
It is an amenable number.
1999033921 is a deficient number, since it is larger than the sum of its proper divisors (26461439).
1999033921 is a wasteful number, since it uses less digits than its factorization.
1999033921 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 86423.
The product of its (nonzero) digits is 118098, while the sum is 46.
The square root of 1999033921 is about 44710.5571537640. The cubic root of 1999033921 is about 1259.7181533444.
The spelling of 1999033921 in words is "one billion, nine hundred ninety-nine million, thirty-three thousand, nine hundred twenty-one".
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