138078503 has 2 divisors, whose sum is σ = 138078504. Its totient is φ = 138078502.

The previous prime is 138078497. The next prime is 138078533. The reversal of 138078503 is 305870831.

138078503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138078503 - 2¹² = 138074407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138078533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69039251 + 69039252.

It is an arithmetic number, because the mean of its divisors is an integer number (69039252).

Almost surely, 2^138078503 is an apocalyptic number.

138078503 is a deficient number, since it is larger than the sum of its proper divisors (1).

138078503 is an equidigital number, since it uses as much as digits as its factorization.

138078503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 138078503 is about 11750.6809589913. The cubic root of 138078503 is about 516.8628960260.

The spelling of 138078503 in words is "one hundred thirty-eight million, seventy-eight thousand, five hundred three".