138858883 has 4 divisors (see below), whose sum is σ = 139106088. Its totient is φ = 138611680.

The previous prime is 138858877. The next prime is 138858893. The reversal of 138858883 is 388858831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 388858831 = 163 ⋅2385637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138858883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138858883.

It is not an unprimeable number, because it can be changed into a prime (138858823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122758 + ... + 123883.

It is an arithmetic number, because the mean of its divisors is an integer number (34776522).

Almost surely, 2^138858883 is an apocalyptic number.

138858883 is a deficient number, since it is larger than the sum of its proper divisors (247205).

138858883 is an equidigital number, since it uses as much as digits as its factorization.

138858883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247204.

The product of its digits is 1474560, while the sum is 52.

The square root of 138858883 is about 11783.8399089601. The cubic root of 138858883 is about 517.8347875303.

Subtracting from 138858883 its sum of digits (52), we obtain a palindrome (138858831).

The spelling of 138858883 in words is "one hundred thirty-eight million, eight hundred fifty-eight thousand, eight hundred eighty-three".