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99876217 = 7192113559
BaseRepresentation
bin1011111001111…
…11110101111001
320221221020102011
411330333311321
5201032014332
613524405521
72321635210
oct574776571
9227836364
1099876217
1151417531
12295468a1
13178cc36c
14d39c077
158b7ce47
hex5f3fd79

99876217 has 16 divisors (see below), whose sum is σ = 120755200. Its totient is φ = 80695440.

The previous prime is 99876211. The next prime is 99876223. The reversal of 99876217 is 71267899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99876211) and next prime (99876223).

It is not a de Polignac number, because 99876217 - 211 = 99874169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99876211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26284 + ... + 29842.

It is an arithmetic number, because the mean of its divisors is an integer number (7547200).

Almost surely, 299876217 is an apocalyptic number.

It is an amenable number.

99876217 is a deficient number, since it is larger than the sum of its proper divisors (20878983).

99876217 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (99876216) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (3796).

99876217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796.

The product of its digits is 381024, while the sum is 49.

The square root of 99876217 is about 9993.8089335348. The cubic root of 99876217 is about 463.9672876884.

The spelling of 99876217 in words is "ninety-nine million, eight hundred seventy-six thousand, two hundred seventeen".

Divisors: 1 7 19 133 211 1477 3559 4009 24913 28063 67621 473347 750949 5256643 14268031 99876217