138904783 has 2 divisors, whose sum is σ = 138904784. Its totient is φ = 138904782.

The previous prime is 138904757. The next prime is 138904789. The reversal of 138904783 is 387409831.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (387409831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138904783 - 2¹⁷ = 138773711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138904789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69452391 + 69452392.

It is an arithmetic number, because the mean of its divisors is an integer number (69452392).

Almost surely, 2^138904783 is an apocalyptic number.

138904783 is a deficient number, since it is larger than the sum of its proper divisors (1).

138904783 is an equidigital number, since it uses as much as digits as its factorization.

138904783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 138904783 is about 11785.7873305096. The cubic root of 138904783 is about 517.8918382516.

The spelling of 138904783 in words is "one hundred thirty-eight million, nine hundred four thousand, seven hundred eighty-three".