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99831271 = 1275411453
BaseRepresentation
bin1011111001101…
…00110111100111
320221211221202111
411330310313213
5201024100041
613523421451
72321360161
oct574646747
9227757674
1099831271
1151396791
1229524887
13178b4a77
14d389931
158b6e981
hex5f34de7

99831271 has 8 divisors (see below), whose sum is σ = 100872704. Its totient is φ = 98794080.

The previous prime is 99831257. The next prime is 99831283. The reversal of 99831271 is 17213899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 6-Lehmer number, since φ(99831271) divides (99831271-1)6.

It is a cyclic number.

It is not a de Polignac number, because 99831271 - 25 = 99831239 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 (99831371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67981 + ... + 69433.

It is an arithmetic number, because the mean of its divisors is an integer number (12609088).

Almost surely, 299831271 is an apocalyptic number.

99831271 is a deficient number, since it is larger than the sum of its proper divisors (1041433).

99831271 is a wasteful number, since it uses less digits than its factorization.

99831271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its digits is 27216, while the sum is 40.

The square root of 99831271 is about 9991.5599883101. The cubic root of 99831271 is about 463.8976795165.

The spelling of 99831271 in words is "ninety-nine million, eight hundred thirty-one thousand, two hundred seventy-one".

Divisors: 1 127 541 1453 68707 184531 786073 99831271