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138526161 = 346175387
BaseRepresentation
bin10000100000110…
…11110111010001
3100122122212011120
420100123313101
5240430314121
621425032453
73301311234
oct1020336721
9318585146
10138526161
1171215834
123a485729
1322912557
141457d41b
15c264bc6
hex841bdd1

138526161 has 4 divisors (see below), whose sum is σ = 184701552. Its totient is φ = 92350772.

The previous prime is 138526133. The next prime is 138526163. The reversal of 138526161 is 161625831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161625831 = 353875277.

It is a cyclic number.

It is not a de Polignac number, because 138526161 - 210 = 138525137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138526163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23087691 + ... + 23087696.

It is an arithmetic number, because the mean of its divisors is an integer number (46175388).

Almost surely, 2138526161 is an apocalyptic number.

It is an amenable number.

138526161 is a deficient number, since it is larger than the sum of its proper divisors (46175391).

138526161 is an equidigital number, since it uses as much as digits as its factorization.

138526161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46175390.

The product of its digits is 8640, while the sum is 33.

The square root of 138526161 is about 11769.7137178438. The cubic root of 138526161 is about 517.4208593300.

The spelling of 138526161 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, one hundred sixty-one".

Divisors: 1 3 46175387 138526161