138076787 has 2 divisors, whose sum is σ = 138076788. Its totient is φ = 138076786.

The previous prime is 138076739. The next prime is 138076823. The reversal of 138076787 is 787670831.

138076787 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 is an emirp because it is prime and its reverse (787670831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138076787 - 2⁸ = 138076531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138076727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69038393 + 69038394.

It is an arithmetic number, because the mean of its divisors is an integer number (69038394).

Almost surely, 2^138076787 is an apocalyptic number.

138076787 is a deficient number, since it is larger than the sum of its proper divisors (1).

138076787 is an equidigital number, since it uses as much as digits as its factorization.

138076787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 138076787 is about 11750.6079417194. The cubic root of 138076787 is about 516.8607548759.

The spelling of 138076787 in words is "one hundred thirty-eight million, seventy-six thousand, seven hundred eighty-seven".