138802789 has 2 divisors, whose sum is σ = 138802790. Its totient is φ = 138802788.

The previous prime is 138802691. The next prime is 138802793. The reversal of 138802789 is 987208831.

138802789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116316225 + 22486564 = 10785^2 + 4742^2 .

It is a cyclic number.

It is not a de Polignac number, because 138802789 - 2⁷ = 138802661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138809789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69401394 + 69401395.

It is an arithmetic number, because the mean of its divisors is an integer number (69401395).

Almost surely, 2^138802789 is an apocalyptic number.

It is an amenable number.

138802789 is a deficient number, since it is larger than the sum of its proper divisors (1).

138802789 is an equidigital number, since it uses as much as digits as its factorization.

138802789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 138802789 is about 11781.4595445556. The cubic root of 138802789 is about 517.7650492555.

The spelling of 138802789 in words is "one hundred thirty-eight million, eight hundred two thousand, seven hundred eighty-nine".