138754859 has 2 divisors, whose sum is σ = 138754860. Its totient is φ = 138754858.

The previous prime is 138754849. The next prime is 138754871. The reversal of 138754859 is 958457831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138754859 is a prime.

It is a super-2 number, since 2×138754859² = 38505821792219762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138754849) 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, 69377429 + 69377430.

It is an arithmetic number, because the mean of its divisors is an integer number (69377430).

Almost surely, 2^138754859 is an apocalyptic number.

138754859 is a deficient number, since it is larger than the sum of its proper divisors (1).

138754859 is an equidigital number, since it uses as much as digits as its factorization.

138754859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 138754859 is about 11779.4252406474. The cubic root of 138754859 is about 517.7054459003.

The spelling of 138754859 in words is "one hundred thirty-eight million, seven hundred fifty-four thousand, eight hundred fifty-nine".