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138619843 is a prime number
BaseRepresentation
bin10000100001100…
…10101111000011
3100122211121200021
420100302233003
5240441313333
621431034311
73302151325
oct1020625703
9318747607
10138619843
117127a15a
123a50b997
132294609b
14145a5615
15c28282d
hex8432bc3

138619843 has 2 divisors, whose sum is σ = 138619844. Its totient is φ = 138619842.

The previous prime is 138619837. The next prime is 138619849. The reversal of 138619843 is 348916831.

It is a balanced prime because it is at equal distance from previous prime (138619837) and next prime (138619849).

It is a cyclic number.

It is not a de Polignac number, because 138619843 - 29 = 138619331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138619843.

It is not a weakly prime, because it can be changed into another prime (138619849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69309921 + 69309922.

It is an arithmetic number, because the mean of its divisors is an integer number (69309922).

Almost surely, 2138619843 is an apocalyptic number.

138619843 is a deficient number, since it is larger than the sum of its proper divisors (1).

138619843 is an equidigital number, since it uses as much as digits as its factorization.

138619843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 138619843 is about 11773.6928361496. The cubic root of 138619843 is about 517.5374729179.

The spelling of 138619843 in words is "one hundred thirty-eight million, six hundred nineteen thousand, eight hundred forty-three".