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83138495 = 51121311049
BaseRepresentation
bin1001111010010…
…01011110111111
312210102212120112
410331021132333
5132240412440
612125540235
72026444166
oct475113677
9183385515
1083138495
1142a25200
1223a1467b
13142bba9b
14b0823dd
157473965
hex4f497bf

83138495 has 24 divisors (see below), whose sum is σ = 110602800. Its totient is φ = 59945600.

The previous prime is 83138477. The next prime is 83138501. The reversal of 83138495 is 59483138.

It is not a de Polignac number, because 83138495 - 210 = 83137471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78731 + ... + 79779.

It is an arithmetic number, because the mean of its divisors is an integer number (4608450).

Almost surely, 283138495 is an apocalyptic number.

83138495 is a deficient number, since it is larger than the sum of its proper divisors (27464305).

83138495 is a wasteful number, since it uses less digits than its factorization.

83138495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1196 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 83138495 is about 9118.0313116374. The cubic root of 83138495 is about 436.4495527967.

The spelling of 83138495 in words is "eighty-three million, one hundred thirty-eight thousand, four hundred ninety-five".

Divisors: 1 5 11 55 121 131 605 655 1049 1441 5245 7205 11539 15851 57695 79255 126929 137419 634645 687095 1511609 7558045 16627699 83138495