138041863 has 4 divisors (see below), whose sum is σ = 138319000. Its totient is φ = 137764728.

The previous prime is 138041861. The next prime is 138041881. The reversal of 138041863 is 368140831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138041863 - 2¹ = 138041861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138041861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137820 + ... + 138817.

It is an arithmetic number, because the mean of its divisors is an integer number (34579750).

Almost surely, 2^138041863 is an apocalyptic number.

138041863 is a deficient number, since it is larger than the sum of its proper divisors (277137).

138041863 is an equidigital number, since it uses as much as digits as its factorization.

138041863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277136.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 138041863 is about 11749.1217969685. The cubic root of 138041863 is about 516.8171743738.

The spelling of 138041863 in words is "one hundred thirty-eight million, forty-one thousand, eight hundred sixty-three".