138696073 has 2 divisors, whose sum is σ = 138696074. Its totient is φ = 138696072.

The previous prime is 138696053. The next prime is 138696083. The reversal of 138696073 is 370696831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135210384 + 3485689 = 11628^2 + 1867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138696073 is a prime.

It is not a weakly prime, because it can be changed into another prime (138696043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69348036 + 69348037.

It is an arithmetic number, because the mean of its divisors is an integer number (69348037).

Almost surely, 2^138696073 is an apocalyptic number.

It is an amenable number.

138696073 is a deficient number, since it is larger than the sum of its proper divisors (1).

138696073 is an equidigital number, since it uses as much as digits as its factorization.

138696073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 138696073 is about 11776.9296932605. The cubic root of 138696073 is about 517.6323238212.

The spelling of 138696073 in words is "one hundred thirty-eight million, six hundred ninety-six thousand, seventy-three".