138719563 has 2 divisors, whose sum is σ = 138719564. Its totient is φ = 138719562.

The previous prime is 138719543. The next prime is 138719593. The reversal of 138719563 is 365917831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138719563 - 2¹⁷ = 138588491 is a prime.

It is not a weakly prime, because it can be changed into another prime (138719533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69359781 + 69359782.

It is an arithmetic number, because the mean of its divisors is an integer number (69359782).

Almost surely, 2^138719563 is an apocalyptic number.

138719563 is a deficient number, since it is larger than the sum of its proper divisors (1).

138719563 is an equidigital number, since it uses as much as digits as its factorization.

138719563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 138719563 is about 11777.9269398311. The cubic root of 138719563 is about 517.6615447805.

The spelling of 138719563 in words is "one hundred thirty-eight million, seven hundred nineteen thousand, five hundred sixty-three".