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84912209 = 307276587
BaseRepresentation
bin1010000111110…
…10100001010001
312220202222122122
411003322201101
5133214142314
612231544025
72050512314
oct503724121
9186688578
1084912209
1143a26888
122452b015
1314790215
14b3c497b
1576c428e
hex50fa851

84912209 has 4 divisors (see below), whose sum is σ = 85189104. Its totient is φ = 84635316.

The previous prime is 84912187. The next prime is 84912259. The reversal of 84912209 is 90221948.

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 a de Polignac number, because none of the positive numbers 2k-84912209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84912259) 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, 137987 + ... + 138600.

It is an arithmetic number, because the mean of its divisors is an integer number (21297276).

Almost surely, 284912209 is an apocalyptic number.

It is an amenable number.

84912209 is a deficient number, since it is larger than the sum of its proper divisors (276895).

84912209 is a wasteful number, since it uses less digits than its factorization.

84912209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276894.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 84912209 is about 9214.7820918348. The cubic root of 84912209 is about 439.5315417091.

The spelling of 84912209 in words is "eighty-four million, nine hundred twelve thousand, two hundred nine".

Divisors: 1 307 276587 84912209