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138361587 = 37133116349
BaseRepresentation
bin10000011111100…
…11101011110011
3100122100111102020
420033303223303
5240410032322
621421322523
73300024360
oct1017635363
9318314366
10138361587
1171113121
123a406443
1322885680
1414539467
15c23105c
hex83f3af3

138361587 has 32 divisors (see below), whose sum is σ = 234393600. Its totient is φ = 70623360.

The previous prime is 138361579. The next prime is 138361621. The reversal of 138361587 is 785163831.

It is not a de Polignac number, because 138361587 - 23 = 138361579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138361567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289 + ... + 16637.

It is an arithmetic number, because the mean of its divisors is an integer number (7324800).

Almost surely, 2138361587 is an apocalyptic number.

138361587 is a deficient number, since it is larger than the sum of its proper divisors (96032013).

138361587 is a wasteful number, since it uses less digits than its factorization.

138361587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16403.

The product of its digits is 120960, while the sum is 42.

The square root of 138361587 is about 11762.7202211053. The cubic root of 138361587 is about 517.2158733447.

The spelling of 138361587 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, five hundred eighty-seven".

Divisors: 1 3 7 13 21 31 39 91 93 217 273 403 651 1209 2821 8463 16349 49047 114443 212537 343329 506819 637611 1487759 1520457 3547733 4463277 6588647 10643199 19765941 46120529 138361587