138181803 has 16 divisors (see below), whose sum is σ = 187246080. Its totient is φ = 90629024.

The previous prime is 138181801. The next prime is 138181811. The reversal of 138181803 is 308181831.

It is a cyclic number.

It is not a de Polignac number, because 138181803 - 2¹ = 138181801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138181801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65950 + ... + 68012.

It is an arithmetic number, because the mean of its divisors is an integer number (11702880).

Almost surely, 2^138181803 is an apocalyptic number.

138181803 is a deficient number, since it is larger than the sum of its proper divisors (49064277).

138181803 is a wasteful number, since it uses less digits than its factorization.

138181803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 138181803 is about 11755.0756271493. The cubic root of 138181803 is about 516.9917566063.

The spelling of 138181803 in words is "one hundred thirty-eight million, one hundred eighty-one thousand, eight hundred three".