138602047 has 2 divisors, whose sum is σ = 138602048. Its totient is φ = 138602046.

The previous prime is 138601999. The next prime is 138602069. The reversal of 138602047 is 740206831.

138602047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138602047 - 2²³ = 130213439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138602647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69301023 + 69301024.

It is an arithmetic number, because the mean of its divisors is an integer number (69301024).

Almost surely, 2^138602047 is an apocalyptic number.

138602047 is a deficient number, since it is larger than the sum of its proper divisors (1).

138602047 is an equidigital number, since it uses as much as digits as its factorization.

138602047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 138602047 is about 11772.9370592049. The cubic root of 138602047 is about 517.5153248358.

Adding to 138602047 its reverse (740206831), we get a palindrome (878808878).

The spelling of 138602047 in words is "one hundred thirty-eight million, six hundred two thousand, forty-seven".