138726603 has 12 divisors (see below), whose sum is σ = 200725200. Its totient is φ = 92326416.

The previous prime is 138726583. The next prime is 138726629. The reversal of 138726603 is 306627831.

It is a happy number.

It is not a de Polignac number, because 138726603 - 2⁵ = 138726571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138726503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7476 + ... + 18257.

It is an arithmetic number, because the mean of its divisors is an integer number (16727100).

Almost surely, 2^138726603 is an apocalyptic number.

138726603 is a deficient number, since it is larger than the sum of its proper divisors (61998597).

138726603 is a wasteful number, since it uses less digits than its factorization.

138726603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26338 (or 26335 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 138726603 is about 11778.2258001789. The cubic root of 138726603 is about 517.6703017180.

The spelling of 138726603 in words is "one hundred thirty-eight million, seven hundred twenty-six thousand, six hundred three".