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19124069 = 22784247
BaseRepresentation
bin100100011110…
…0111101100101
31022222121021212
41020330331211
514343432234
61521521205
7321360206
oct110747545
938877255
1019124069
11a882218
1264a3205
133c67823
14277b5ad
151a2b5ce
hex123cf65

19124069 has 4 divisors (see below), whose sum is σ = 19208544. Its totient is φ = 19039596.

The previous prime is 19124059. The next prime is 19124071. The reversal of 19124069 is 96042191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19124069 - 28 = 19123813 is a prime.

It is a super-3 number, since 3×191240693 (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19124009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41897 + ... + 42350.

It is an arithmetic number, because the mean of its divisors is an integer number (4802136).

Almost surely, 219124069 is an apocalyptic number.

It is an amenable number.

19124069 is a deficient number, since it is larger than the sum of its proper divisors (84475).

19124069 is an equidigital number, since it uses as much as digits as its factorization.

19124069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84474.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19124069 is about 4373.1074763834. The cubic root of 19124069 is about 267.4197226137.

The spelling of 19124069 in words is "nineteen million, one hundred twenty-four thousand, sixty-nine".

Divisors: 1 227 84247 19124069