138794567 has 2 divisors, whose sum is σ = 138794568. Its totient is φ = 138794566.

The previous prime is 138794507. The next prime is 138794569. The reversal of 138794567 is 765497831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138794567 - 2⁸ = 138794311 is a prime.

Together with 138794569, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138794569) 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, 69397283 + 69397284.

It is an arithmetic number, because the mean of its divisors is an integer number (69397284).

Almost surely, 2^138794567 is an apocalyptic number.

138794567 is a deficient number, since it is larger than the sum of its proper divisors (1).

138794567 is an equidigital number, since it uses as much as digits as its factorization.

138794567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 138794567 is about 11781.1106012973. The cubic root of 138794567 is about 517.7548257618.

The spelling of 138794567 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, five hundred sixty-seven".