138765833 has 4 divisors (see below), whose sum is σ = 138822660. Its totient is φ = 138709008.

The previous prime is 138765787. The next prime is 138765857. The reversal of 138765833 is 338567831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96098809 + 42667024 = 9803^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 138765833 - 2⁶ = 138765769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138765433) 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, 24578 + ... + 29691.

It is an arithmetic number, because the mean of its divisors is an integer number (34705665).

Almost surely, 2^138765833 is an apocalyptic number.

It is an amenable number.

138765833 is a deficient number, since it is larger than the sum of its proper divisors (56827).

138765833 is an equidigital number, since it uses as much as digits as its factorization.

138765833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56826.

The product of its digits is 362880, while the sum is 44.

The square root of 138765833 is about 11779.8910436387. The cubic root of 138765833 is about 517.7190938302.

The spelling of 138765833 in words is "one hundred thirty-eight million, seven hundred sixty-five thousand, eight hundred thirty-three".