138876783 has 12 divisors (see below), whose sum is σ = 193572120. Its totient is φ = 88558096.

The previous prime is 138876779. The next prime is 138876811. The reversal of 138876783 is 387678831.

It is not a de Polignac number, because 138876783 - 2² = 138876779 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138876883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42168 + ... + 45341.

It is an arithmetic number, because the mean of its divisors is an integer number (16131010).

Almost surely, 2^138876783 is an apocalyptic number.

138876783 is a deficient number, since it is larger than the sum of its proper divisors (54695337).

138876783 is an equidigital number, since it uses as much as digits as its factorization.

138876783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87558 (or 87535 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 138876783 is about 11784.5993992159. The cubic root of 138876783 is about 517.8570375639.

The spelling of 138876783 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, seven hundred eighty-three".