138658603 has 2 divisors, whose sum is σ = 138658604. Its totient is φ = 138658602.

The previous prime is 138658519. The next prime is 138658621. The reversal of 138658603 is 306856831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138658603 - 2²⁵ = 105104171 is a prime.

It is not a weakly prime, because it can be changed into another prime (138658633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69329301 + 69329302.

It is an arithmetic number, because the mean of its divisors is an integer number (69329302).

Almost surely, 2^138658603 is an apocalyptic number.

138658603 is a deficient number, since it is larger than the sum of its proper divisors (1).

138658603 is an equidigital number, since it uses as much as digits as its factorization.

138658603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 138658603 is about 11775.3387637044. The cubic root of 138658603 is about 517.5857052697.

The spelling of 138658603 in words is "one hundred thirty-eight million, six hundred fifty-eight thousand, six hundred three".