138874927 has 2 divisors, whose sum is σ = 138874928. Its totient is φ = 138874926.

The previous prime is 138874919. The next prime is 138874937. The reversal of 138874927 is 729478831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138874927 - 2³ = 138874919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138874937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69437463 + 69437464.

It is an arithmetic number, because the mean of its divisors is an integer number (69437464).

Almost surely, 2^138874927 is an apocalyptic number.

138874927 is a deficient number, since it is larger than the sum of its proper divisors (1).

138874927 is an equidigital number, since it uses as much as digits as its factorization.

138874927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 138874927 is about 11784.5206521097. The cubic root of 138874927 is about 517.8547306101.

The spelling of 138874927 in words is "one hundred thirty-eight million, eight hundred seventy-four thousand, nine hundred twenty-seven".