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19000069 = 119717807
BaseRepresentation
bin100100001111…
…0101100000101
31022202022012021
41020132230011
514331000234
61515123141
7320332534
oct110365405
938668167
1019000069
11a7a8040
1264434b1
133c2325a
14274831b
151a049b4
hex121eb05

19000069 has 8 divisors (see below), whose sum is σ = 20942208. Its totient is φ = 17093760.

The previous prime is 19000043. The next prime is 19000073. The reversal of 19000069 is 96000091.

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 19000069 - 219 = 18475781 is a prime.

It is a super-2 number, since 2×190000692 = 722005244009522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19000099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7837 + ... + 9970.

It is an arithmetic number, because the mean of its divisors is an integer number (2617776).

Almost surely, 219000069 is an apocalyptic number.

It is an amenable number.

19000069 is a deficient number, since it is larger than the sum of its proper divisors (1942139).

19000069 is a wasteful number, since it uses less digits than its factorization.

19000069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17915.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 19000069 is about 4358.9068583763. The cubic root of 19000069 is about 266.8404878888.

The spelling of 19000069 in words is "nineteen million, sixty-nine", and thus it is an aban number and an uban number.

Divisors: 1 11 97 1067 17807 195877 1727279 19000069