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108638083 = 523207721
BaseRepresentation
bin1100111100110…
…10111110000011
321120102101102201
412132122332003
5210302404313
614440254031
72456260051
oct636327603
9246371381
10108638083
1156361444
1230471317
13196794b8
14105dd1d1
15980e0dd
hex679af83

108638083 has 4 divisors (see below), whose sum is σ = 108846328. Its totient is φ = 108429840.

The previous prime is 108638059. The next prime is 108638093. The reversal of 108638083 is 380836801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 380836801 = 794820719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-108638083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108638053) 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, 103338 + ... + 104383.

It is an arithmetic number, because the mean of its divisors is an integer number (27211582).

Almost surely, 2108638083 is an apocalyptic number.

108638083 is a deficient number, since it is larger than the sum of its proper divisors (208245).

108638083 is an equidigital number, since it uses as much as digits as its factorization.

108638083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208244.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 108638083 is about 10422.9594165957. The cubic root of 108638083 is about 477.1563390744.

The spelling of 108638083 in words is "one hundred eight million, six hundred thirty-eight thousand, eighty-three".

Divisors: 1 523 207721 108638083