138935803 has 4 divisors (see below), whose sum is σ = 139532328. Its totient is φ = 138339280.

The previous prime is 138935767. The next prime is 138935813. The reversal of 138935803 is 308539831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308539831 = 97 ⋅3180823.

It is a cyclic number.

It is not a de Polignac number, because 138935803 - 2²⁵ = 105381371 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138935813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297913 + ... + 298378.

It is an arithmetic number, because the mean of its divisors is an integer number (34883082).

Almost surely, 2^138935803 is an apocalyptic number.

138935803 is a deficient number, since it is larger than the sum of its proper divisors (596525).

138935803 is an equidigital number, since it uses as much as digits as its factorization.

138935803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596524.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 138935803 is about 11787.1032488903. The cubic root of 138935803 is about 517.9303869820.

The spelling of 138935803 in words is "one hundred thirty-eight million, nine hundred thirty-five thousand, eight hundred three".