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999214909 = 7311318543
BaseRepresentation
bin111011100011101…
…100111100111101
32120122012101011121
4323203230330331
54021244334114
6243052350541
733522121000
oct7343547475
92518171147
10999214909
11473037a50
1223a775451
1312c023a34
14969c5537
155cac8a24
hex3b8ecf3d

999214909 has 32 divisors (see below), whose sum is σ = 1312358400. Its totient is φ = 753404400.

The previous prime is 999214907. The next prime is 999214919. The reversal of 999214909 is 909412999.

It is not a de Polignac number, because 999214909 - 21 = 999214907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999214901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112692 + ... + 121234.

It is an arithmetic number, because the mean of its divisors is an integer number (41011200).

Almost surely, 2999214909 is an apocalyptic number.

It is an amenable number.

999214909 is a deficient number, since it is larger than the sum of its proper divisors (313143491).

999214909 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (999214908) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (8592).

999214909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606 (or 8592 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 52.

The square root of 999214909 is about 31610.3607856665. The cubic root of 999214909 is about 999.7382344848.

The spelling of 999214909 in words is "nine hundred ninety-nine million, two hundred fourteen thousand, nine hundred nine".

Divisors: 1 7 11 31 49 77 217 341 343 539 1519 2387 3773 8543 10633 16709 59801 93973 116963 264833 418607 657811 1853831 2913163 2930249 4604677 12976817 20392141 32232739 90837719 142744987 999214909