138924727 has 2 divisors, whose sum is σ = 138924728. Its totient is φ = 138924726.

The previous prime is 138924719. The next prime is 138924791. The reversal of 138924727 is 727429831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138924727 - 2³ = 138924719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138924707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69462363 + 69462364.

It is an arithmetic number, because the mean of its divisors is an integer number (69462364).

Almost surely, 2^138924727 is an apocalyptic number.

138924727 is a deficient number, since it is larger than the sum of its proper divisors (1).

138924727 is an equidigital number, since it uses as much as digits as its factorization.

138924727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 138924727 is about 11786.6334039878. The cubic root of 138924727 is about 517.9166234325.

The spelling of 138924727 in words is "one hundred thirty-eight million, nine hundred twenty-four thousand, seven hundred twenty-seven".