138730573 has 2 divisors, whose sum is σ = 138730574. Its totient is φ = 138730572.

The previous prime is 138730567. The next prime is 138730583. The reversal of 138730573 is 375037831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138368169 + 362404 = 11763^2 + 602^2 .

It is a cyclic number.

It is not a de Polignac number, because 138730573 - 2⁵ = 138730541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138730583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69365286 + 69365287.

It is an arithmetic number, because the mean of its divisors is an integer number (69365287).

Almost surely, 2^138730573 is an apocalyptic number.

It is an amenable number.

138730573 is a deficient number, since it is larger than the sum of its proper divisors (1).

138730573 is an equidigital number, since it uses as much as digits as its factorization.

138730573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 138730573 is about 11778.3943302982. The cubic root of 138730573 is about 517.6752398035.

The spelling of 138730573 in words is "one hundred thirty-eight million, seven hundred thirty thousand, five hundred seventy-three".