138230047 has 2 divisors, whose sum is σ = 138230048. Its totient is φ = 138230046.

The previous prime is 138230041. The next prime is 138230051. The reversal of 138230047 is 740032831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138230047 - 2⁷ = 138229919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138229997 and 138230024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138230041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69115023 + 69115024.

It is an arithmetic number, because the mean of its divisors is an integer number (69115024).

Almost surely, 2^138230047 is an apocalyptic number.

138230047 is a deficient number, since it is larger than the sum of its proper divisors (1).

138230047 is an equidigital number, since it uses as much as digits as its factorization.

138230047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 138230047 is about 11757.1274978202. The cubic root of 138230047 is about 517.0519161151.

Adding to 138230047 its reverse (740032831), we get a palindrome (878262878).

The spelling of 138230047 in words is "one hundred thirty-eight million, two hundred thirty thousand, forty-seven".